fix
This commit is contained in:
James
parent
3068f6805e
commit
5d4a5a9673
@ -319,7 +319,7 @@ bool processBasicInfo(byte *data, unsigned int dataLen){
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Serial.printf(">>>RC.%s.Voltage %f\r\n",currentName, (float)Volts / 1000);
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Serial.printf(">>>RC.%s.Amps %f\r\n",currentName, (float)Amps / 1000);
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Serial.printf(">>>RC.%s.watts %f\r\n",currentName, (float)Watts);
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Serial.printf(">>>RC.%s.Watts %f\r\n",currentName, (float)Watts);
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Serial.printf(">>>RC.%s.Capacity_Remain_Ah %f\r\n",currentName, (float)CapacityRemainAh / 1000);
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Serial.printf(">>>RC.%s.Capacity_Remain_Wh %f\r\n",currentName, ((float)(CapacityRemainAh) / 1000) * ((float)(Volts) / 1000));
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Serial.printf(">>>RC.%s.Capacity_Remain_Percent %d\r\n",currentName, CapacityRemainPercent);
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592
old/ESPBMS.ino
592
old/ESPBMS.ino
@ -1,592 +0,0 @@
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// ==== CONFIGURATION ====
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// BMS
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#define BMS_MAX_CELLS 15 // defines size of data types
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#define BMS_POLLING_INTERVAL 10*60*1000 // data output interval (shorter = connect more often = more battery consumption from BMS) in ms
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// BLE
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#define BLE_SCAN_DURATION 1 // duration of scan in seconds
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#define BLE_REQUEST_DELAY 500 // package request delay after connecting - make this large enough to have the connection established in ms
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#define BLE_TIMEOUT 600*1000 // timeout of scan + gathering packets (too short will fail collecting all packets) in ms
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#define BLE_CALLBACK_DEBUG true // send debug messages via MQTT & serial in callbacks (handy for finding your BMS address, name, RSSI, etc)
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// ==== MAIN CODE ====
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#include "datatypes.h" // for brevity the BMS stuff is in this file
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#include <BLEDevice.h> // for BLE
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#include <driver/adc.h> // to read ESP battery voltage
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#include <rom/rtc.h> // to get reset reason
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// Init BMS
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static BLEUUID serviceUUID("0000ff00-0000-1000-8000-00805f9b34fb"); //xiaoxiang bms service
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static BLEUUID charUUID_rx("0000ff01-0000-1000-8000-00805f9b34fb"); //xiaoxiang bms rx id
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static BLEUUID charUUID_tx("0000ff02-0000-1000-8000-00805f9b34fb"); //xiaoxiang bms tx id
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const byte cBasicInfo = 3; //datablock 3=basic info
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const byte cCellInfo = 4; //datablock 4=individual cell info
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packBasicInfoStruct packBasicInfo;
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packCellInfoStruct packCellInfo;
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unsigned long bms_last_update_time=0;
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bool bms_status;
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#define BLE_PACKETSRECEIVED_BEFORE_STANDBY 0b11 // packets to gather before disconnecting
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// Other stuff
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float battery_voltage=0; // internal battery voltage
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String debug_log_string="";
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hw_timer_t * wd_timer = NULL;
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void debug(String s){
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Serial.println(s);
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}
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void setup(){
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Serial.begin(115200);
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}
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// === Main stuff ====
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void loop(){
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bleGatherPackets();
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}
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BLEScan* pBLEScan = nullptr;
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BLEClient* pClient = nullptr;
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BLEAdvertisedDevice* pRemoteDevice = nullptr;
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BLERemoteService* pRemoteService = nullptr;
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BLERemoteCharacteristic* pRemoteCharacteristic_rx = nullptr;
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BLERemoteCharacteristic* pRemoteCharacteristic_tx = nullptr;
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boolean doScan = false; // becomes true when BLE is initialized and scanning is allowed
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boolean doConnect = false; // becomes true when correct ID is found during scanning
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boolean ble_client_connected = false; // true when fully connected
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unsigned int ble_packets_requested = 0b00; // keeps track of requested packets
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unsigned int ble_packets_received = 0b00; // keeps track of received packets
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void MyEndOfScanCallback(BLEScanResults pBLEScanResult){
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bms_status=false; // BMS not found
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if(BLE_CALLBACK_DEBUG){
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debug("BLE: scan finished");
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Serial.println("Scan finished.");
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}
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}
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class MyAdvertisedDeviceCallbacks : public BLEAdvertisedDeviceCallbacks{
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// called for each advertising BLE server
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void onResult(BLEAdvertisedDevice advertisedDevice){
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// found a device
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if(BLE_CALLBACK_DEBUG){
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debug(
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String("BLE: found ") +
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String(advertisedDevice.getName().c_str()) +
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String(" with address ") +
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String(advertisedDevice.getAddress().toString().c_str()) +
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String(" and RSSI ") +
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String(advertisedDevice.getRSSI())
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);
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Serial.print("BLE: found ");
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Serial.println(advertisedDevice.toString().c_str());
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}
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// Check if device is advertising the specific service UUID
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if (!advertisedDevice.isAdvertisingService(serviceUUID)) {
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debug("Device does not advertise the specified service UUID.");
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return;
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}
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if(BLE_CALLBACK_DEBUG){
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debug("BLE: target device found");
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}
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pBLEScan->stop();
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// delete old remote device, create new one
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if(pRemoteDevice != nullptr){
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delete pRemoteDevice;
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}
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pRemoteDevice = new BLEAdvertisedDevice(advertisedDevice);
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doConnect = true;
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}
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};
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class MyClientCallback : public BLEClientCallbacks{
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// called on connect/disconnect
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void onConnect(BLEClient* pclient){
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if(BLE_CALLBACK_DEBUG){
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debug(String("BLE: connecting to ") + String(pclient->getPeerAddress().toString().c_str()));
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}
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}
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void onDisconnect(BLEClient* pclient){
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ble_client_connected = false;
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doConnect = false;
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if(BLE_CALLBACK_DEBUG){
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debug(String("BLE: disconnected from ") + String(pclient->getPeerAddress().toString().c_str()));
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}
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}
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};
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static void MyNotifyCallback(BLERemoteCharacteristic *pBLERemoteCharacteristic, uint8_t *pData, size_t length, bool isNotify){
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//this is called when BLE server sents data via notification
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//hexDump((char*)pData, length);
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if(!bleCollectPacket((char *)pData, length)){
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debug("ERROR: packet could not be collected.");
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}
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}
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void handleBLE(){
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static unsigned long prev_millis_standby = 0;
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prev_millis_standby = millis();
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while(true){ // loop until we hit a timeout or gathered all packets
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if((ble_packets_received == BLE_PACKETSRECEIVED_BEFORE_STANDBY) || (millis()>prev_millis_standby+BLE_TIMEOUT)){
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if(ble_packets_received == BLE_PACKETSRECEIVED_BEFORE_STANDBY){
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debug("BLE: all packets received");
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bms_status=true; // BMS was connected, data up-to-date
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printBasicInfo();
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printCellInfo();
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}else{
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debug("BLE: connection timeout");
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bms_status=false; // BMS not (fully) connected
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}
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break; // we're done with BLE, exit while loop
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}
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else if (doConnect){
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// found the desired BLE server, now connect to it
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if (connectToServer()){
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ble_client_connected = true;
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ble_packets_received=0;
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ble_packets_requested=0;
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}else{
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ble_client_connected = false;
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debug("BLE: failed to connect");
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}
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doConnect = false;
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}
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if (ble_client_connected){
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debug("BLE: requesting packet 0b01");
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delay(5000);
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bmsRequestBasicInfo();
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debug("BLE: requesting packet 0b10");
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delay(5000);
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bmsRequestCellInfo();
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}else if ((!doConnect)&&(doScan)){
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// we are not connected, so we can scan for devices
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debug("BLE: not connected, starting scan");
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Serial.print("BLE is not connected, starting scan");
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// Disconnect client
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if((pClient != nullptr)&&(pClient->isConnected())){
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pClient->disconnect();
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}
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// stop scan (if running) and start a new one
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pBLEScan->setActiveScan(true);
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pBLEScan->setInterval(1 << 8); // 160 ms
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pBLEScan->setWindow(1 << 7); // 80 ms
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pBLEScan->start(BLE_SCAN_DURATION, MyEndOfScanCallback, false); // non-blocking, use a callback
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doScan=false;
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debug("BLE: scan started");
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}
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}
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}
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void bleGatherPackets(){
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bleStart();
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handleBLE();
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blePause();
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BLEDevice::deinit(false);
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}
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void bleStart(){
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Serial.print("Starting BLE... ");
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BLEDevice::init("");
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//esp_bt_controller_mem_release(ESP_BT_MODE_CLASSIC_BT); // release some unused memory
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// Retrieve a BLE client
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pClient = BLEDevice::createClient();
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pClient->setClientCallbacks(new MyClientCallback());
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// Retrieve a BLE scanner
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pBLEScan = BLEDevice::getScan();
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pBLEScan->setAdvertisedDeviceCallbacks(new MyAdvertisedDeviceCallbacks());
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bleContinue();
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Serial.println("done");
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}
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void blePause(){
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// stop scanning and disconnect from all devices
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doScan=false;
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// Disconnect client
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if((pClient != nullptr)&&(pClient->isConnected())){
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pClient->disconnect();
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}
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delay(50);
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pBLEScan->stop();
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ble_client_connected=false;
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doConnect=false;
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ble_packets_received=0;
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ble_packets_requested=0;
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}
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void bleContinue(){
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// Prepare for scanning
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ble_client_connected=false;
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doConnect=false;
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ble_packets_received=0;
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doScan=true; // start scanning for new devices
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}
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bool connectToServer(){
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if(pRemoteDevice==nullptr){
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Serial.println("Invalid remote device, can't connect");
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return false;
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}
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// Disconnect client
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if((pClient != nullptr)&&(pClient->isConnected())){
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pClient->disconnect();
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}
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Serial.print("Forming a connection to ");
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Serial.println(pRemoteDevice->getAddress().toString().c_str());
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delay(100);
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// Connect to the remote BLE Server.
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pClient->connect(pRemoteDevice);
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if(!(pClient->isConnected())){
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debug(String("BLE: failed to connect"));
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Serial.println("Failed to connect to server");
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pClient->disconnect();
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return false;
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}
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Serial.println(" - Connected to server");
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delay(BLE_REQUEST_DELAY); // wait, otherwise writeValue doesn't work for some reason
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// to do: fix this ugly hack
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debug(String("BLE: connected"));
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return true;
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}
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bool sendCommand(uint8_t *data, uint32_t dataLen){
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if((pClient!=nullptr)&&(pClient->isConnected())){
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pRemoteCharacteristic_tx->writeValue(data, dataLen, false);
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return true;
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}else{
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return false;
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}
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}
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bool isPacketValid(byte *packet) //check if packet is valid
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{
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if (packet == nullptr){
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return false;
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}
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bmsPacketHeaderStruct *pHeader = (bmsPacketHeaderStruct *)packet;
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int checksumPos = pHeader->dataLen + 2; // status + data len + data
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int offset = 2; // header 0xDD and command type are not in data length
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if (packet[0] != 0xDD){
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// start bit missing
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return false;
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}
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if (packet[offset + checksumPos + 2] != 0x77){
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// stop bit missing
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return false;
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}
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byte checksum = 0;
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for (int i = 0; i < checksumPos; i++){
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checksum += packet[offset + i];
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}
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checksum = ((checksum ^ 0xFF) + 1) & 0xFF;
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if (checksum != packet[offset + checksumPos + 1]){
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return false;
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}
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return true;
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}
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bool processBasicInfo(packBasicInfoStruct *output, byte *data, unsigned int dataLen)
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{
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// Expected data len
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if (dataLen != 0x1B)
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{
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//Serial.printf("bad data len %d!\r\n",dataLen);
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//return false;
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}
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output->Volts = ((uint32_t)two_ints_into16(data[0], data[1])) * 10; // Resolution 10 mV -> convert to milivolts eg 4895 > 48950mV
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output->Amps = ((int32_t)two_ints_into16(data[2], data[3])) * 10; // Resolution 10 mA -> convert to miliamps
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output->Watts = output->Volts * output->Amps / 1000000; // W
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output->CapacityRemainAh = ((uint16_t)two_ints_into16(data[4], data[5])) * 10;
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output->CapacityRemainPercent = ((uint8_t)data[19]);
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output->Temp1 = (((uint16_t)two_ints_into16(data[23], data[24])) - 2731);
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output->Temp2 = (((uint16_t)two_ints_into16(data[25], data[26])) - 2731);
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output->BalanceCodeLow = (two_ints_into16(data[12], data[13]));
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output->BalanceCodeHigh = (two_ints_into16(data[14], data[15]));
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output->MosfetStatus = ((byte)data[20]);
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printBasicInfo();
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return true;
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}
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bool processCellInfo(packCellInfoStruct *output, byte *data, unsigned int dataLen)
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{
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uint16_t _cellSum;
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uint16_t _cellMin = 5000;
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uint16_t _cellMax = 0;
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uint16_t _cellAvg;
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uint16_t _cellDiff;
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output->NumOfCells = dataLen / 2; // data contains 2 bytes per cell
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//go trough individual cells
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for (byte i = 0; i < dataLen / 2; i++)
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{
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output->CellVolt[i] = ((uint16_t)two_ints_into16(data[i * 2], data[i * 2 + 1])); // Resolution 1 mV
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_cellSum += output->CellVolt[i];
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if (output->CellVolt[i] > _cellMax)
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{
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_cellMax = output->CellVolt[i];
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}
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if (output->CellVolt[i] < _cellMin)
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{
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_cellMin = output->CellVolt[i];
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}
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}
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output->CellMin = _cellMin;
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output->CellMax = _cellMax;
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output->CellDiff = _cellMax - _cellMin;
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output->CellAvg = _cellSum / output->NumOfCells;
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printCellInfo();
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return true;
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}
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bool bmsProcessPacket(byte *packet)
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{
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bool isValid = isPacketValid(packet);
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if (isValid != true)
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{
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Serial.println("Invalid packer received");
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return false;
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}
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bmsPacketHeaderStruct *pHeader = (bmsPacketHeaderStruct *)packet;
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byte *data = packet + sizeof(bmsPacketHeaderStruct); // TODO Fix this ugly hack
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unsigned int dataLen = pHeader->dataLen;
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bool result = false;
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// find packet type (basic info or cell info)
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switch (pHeader->type)
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{
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case cBasicInfo:
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{
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// Process basic info
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result = processBasicInfo(&packBasicInfo, data, dataLen);
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if(result==true){
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ble_packets_received |= 0b01;
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bms_last_update_time=millis();
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}
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break;
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}
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case cCellInfo:
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{
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// Process cell info
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result = processCellInfo(&packCellInfo, data, dataLen);
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if(result==true){
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ble_packets_received |= 0b10;
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bms_last_update_time=millis();
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}
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break;
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}
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default:
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result = false;
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Serial.printf("Unsupported packet type detected. Type: %d", pHeader->type);
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}
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return result;
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}
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bool bleCollectPacket(char *data, uint32_t dataSize) // reconstruct packet, called by notifyCallback function
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{
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static uint8_t packetstate = 0; //0 - empty, 1 - first half of packet received, 2- second half of packet received
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// packet sizes:
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// (packet ID 03) = 4 (header) + 23 + 2*N_NTCs + 2 (checksum) + 1 (stop)
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// (packet ID 04) = 4 (header) + 2*NUM_CELLS + 2 (checksum) + 1 (stop)
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static uint8_t packetbuff[4 + 2*25 + 2 + 1] = {0x0}; // buffer size suitable for up to 25 cells
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static uint32_t totalDataSize = 0;
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bool retVal = false;
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hexDump(data,dataSize);
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if(totalDataSize + dataSize > sizeof(packetbuff)){
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Serial.printf("ERROR: datasize is overlength.");
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debug(
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String("ERROR: datasize is overlength. ") +
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String("allocated=") +
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String(sizeof(packetbuff)) +
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String(", size=") +
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String(totalDataSize + dataSize)
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);
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totalDataSize = 0;
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packetstate = 0;
|
||||
|
||||
retVal = false;
|
||||
}
|
||||
else if (data[0] == 0xdd && packetstate == 0) // probably got 1st half of packet
|
||||
{
|
||||
Serial.println("PKT1");
|
||||
packetstate = 1;
|
||||
for (uint8_t i = 0; i < dataSize; i++)
|
||||
{
|
||||
packetbuff[i] = data[i];
|
||||
}
|
||||
totalDataSize = dataSize;
|
||||
retVal = true;
|
||||
|
||||
if (data[dataSize - 1] == 0x77) {
|
||||
//its full packets
|
||||
packetstate = 2;
|
||||
}
|
||||
}
|
||||
else if (data[dataSize - 1] == 0x77 && packetstate == 1) //probably got 2nd half of the packet
|
||||
{
|
||||
Serial.println("PKT2");
|
||||
packetstate = 2;
|
||||
for (uint8_t i = 0; i < dataSize; i++)
|
||||
{
|
||||
packetbuff[i + totalDataSize] = data[i];
|
||||
}
|
||||
totalDataSize += dataSize;
|
||||
retVal = true;
|
||||
}
|
||||
|
||||
if (packetstate == 2) //got full packet
|
||||
{
|
||||
Serial.println("PKT3");
|
||||
uint8_t packet[totalDataSize];
|
||||
memcpy(packet, packetbuff, totalDataSize);
|
||||
|
||||
bmsProcessPacket(packet); //pass pointer to retrieved packet to processing function
|
||||
packetstate = 0;
|
||||
totalDataSize = 0;
|
||||
retVal = true;
|
||||
}
|
||||
return retVal;
|
||||
}
|
||||
|
||||
bool bmsRequestBasicInfo(){
|
||||
// header status command length data checksum footer
|
||||
// DD A5 03 00 FF FD 77
|
||||
uint8_t data[7] = {0xdd, 0xa5, cBasicInfo, 0x0, 0xff, 0xfd, 0x77};
|
||||
return sendCommand(data, sizeof(data));
|
||||
}
|
||||
|
||||
bool bmsRequestCellInfo(){
|
||||
// header status command length data checksum footer
|
||||
// DD A5 04 00 FF FC 77
|
||||
uint8_t data[7] = {0xdd, 0xa5, cCellInfo, 0x0, 0xff, 0xfc, 0x77};
|
||||
return sendCommand(data, sizeof(data));
|
||||
}
|
||||
|
||||
void printBasicInfo() //debug all data to uart
|
||||
{
|
||||
Serial.printf("Total voltage: %f\r\n", (float)packBasicInfo.Volts / 1000);
|
||||
Serial.printf("Amps: %f\r\n", (float)packBasicInfo.Amps / 1000);
|
||||
Serial.printf("CapacityRemainAh: %f\r\n", (float)packBasicInfo.CapacityRemainAh / 1000);
|
||||
Serial.printf("CapacityRemainPercent: %d\r\n", packBasicInfo.CapacityRemainPercent);
|
||||
Serial.printf("Temp1: %f\r\n", (float)packBasicInfo.Temp1 / 10);
|
||||
Serial.printf("Temp2: %f\r\n", (float)packBasicInfo.Temp2 / 10);
|
||||
Serial.printf("Balance Code Low: 0x%x\r\n", packBasicInfo.BalanceCodeLow);
|
||||
Serial.printf("Balance Code High: 0x%x\r\n", packBasicInfo.BalanceCodeHigh);
|
||||
Serial.printf("Mosfet Status: 0x%x\r\n", packBasicInfo.MosfetStatus);
|
||||
}
|
||||
|
||||
void printCellInfo() //debug all data to uart
|
||||
{
|
||||
Serial.printf("Number of cells: %u\r\n", packCellInfo.NumOfCells);
|
||||
for (byte i = 1; i <= packCellInfo.NumOfCells; i++)
|
||||
{
|
||||
Serial.printf("Cell no. %u", i);
|
||||
Serial.printf(" %f\r\n", (float)packCellInfo.CellVolt[i - 1] / 1000);
|
||||
}
|
||||
Serial.printf("Max cell volt: %f\r\n", (float)packCellInfo.CellMax / 1000);
|
||||
Serial.printf("Min cell volt: %f\r\n", (float)packCellInfo.CellMin / 1000);
|
||||
Serial.printf("Difference cell volt: %f\r\n", (float)packCellInfo.CellDiff / 1000);
|
||||
Serial.printf("Average cell volt: %f\r\n", (float)packCellInfo.CellAvg / 1000);
|
||||
Serial.println();
|
||||
}
|
||||
|
||||
void hexDump(const char *data, uint32_t dataSize) //debug function
|
||||
{
|
||||
Serial.println("HEX data:");
|
||||
|
||||
for (int i = 0; i < dataSize; i++)
|
||||
{
|
||||
Serial.printf("0x%x, ", data[i]);
|
||||
}
|
||||
Serial.println("");
|
||||
}
|
||||
|
||||
int16_t two_ints_into16(int highbyte, int lowbyte) // turns two bytes into a single long integer
|
||||
{
|
||||
int16_t result = (highbyte);
|
||||
result <<= 8; //Left shift 8 bits,
|
||||
result = (result | lowbyte); //OR operation, merge the two
|
||||
return result;
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user