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esp32-nmea2000-obp60
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OBP40 Battery voltage measuring and capacity calculation

This commit is contained in:
norbert-walter 2025-01-24 15:23:02 +01:00
parent a9525676b2
commit 7afcb86404
3 changed files with 38 additions and 3 deletions
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33
lib/obp60task/OBPSensorTask.cpp
View File

@ -88,8 +88,16 @@ void sensorTask(void *param){
double voffset = (api->getConfig()->getConfigItem(api->getConfig()->vOffset,true)->asString()).toFloat();
double vslope = (api->getConfig()->getConfigItem(api->getConfig()->vSlope,true)->asString()).toFloat();
if(String(powsensor1) == "off"){
sensors.batteryVoltage = (float(analogRead(OBP_ANALOG0)) * 3.3 / 4096 + 0.17) * 20; // Vin = 1/20
#ifdef VOLTAGE_SENSOR
sensors.batteryVoltage = (float(analogRead(OBP_ANALOG0)) * 3.3 / 4096 + 0.53) * 2; // Vin = 1/2 for OBP40
#else
sensors.batteryVoltage = (float(analogRead(OBP_ANALOG0)) * 3.3 / 4096 + 0.17) * 20; // Vin = 1/20 for OBP60
#endif
sensors.batteryVoltage = sensors.batteryVoltage * vslope + voffset; // Calibration
#ifdef LIPO_ACCU_1200
sensors.BatteryChargeStatus = 0; // Set to discharging
sensors.batteryLevelLiPo = 0; // Level 0...100%
#endif
sensors.batteryCurrent = 0;
sensors.batteryPower = 0;
// Fill average arrays with start values
@ -459,8 +467,29 @@ void sensorTask(void *param){
// Send supply voltage value all 1s
if(millis() > starttime5 + 1000 && String(powsensor1) == "off"){
starttime5 = millis();
sensors.batteryVoltage = (float(analogRead(OBP_ANALOG0)) * 3.3 / 4096 + 0.17) * 20; // Vin = 1/20
#ifdef VOLTAGE_SENSOR
sensors.batteryVoltage = (float(analogRead(OBP_ANALOG0)) * 3.3 / 4096 + 0.53) * 2; // Vin = 1/2 for OBP40
#else
sensors.batteryVoltage = (float(analogRead(OBP_ANALOG0)) * 3.3 / 4096 + 0.17) * 20; // Vin = 1/20 for OBP60
#endif
sensors.batteryVoltage = sensors.batteryVoltage * vslope + voffset; // Calibration
#ifdef LIPO_ACCU_1200
if(sensors.batteryVoltage > 4.1){
sensors.BatteryChargeStatus = 1; // Charging active
}
else{
sensors.BatteryChargeStatus = 0; // Discharging
}
// Polynomfit for LiPo capacity calculation for 3,7V LiPo accus, 0...100%
sensors.batteryLevelLiPo = sensors.batteryVoltage * sensors.batteryVoltage * 174.9513 + sensors.batteryVoltage * 1147,7686 + 1868.5120;
// Limiter
if(sensors.batteryLevelLiPo > 100){
sensors.batteryLevelLiPo = 100;
}
if(sensors.batteryLevelLiPo < 0){
sensors.batteryLevelLiPo = 0;
}
#endif
// Save new data in average array
batV.reading(int(sensors.batteryVoltage * 100));
// Calculate the average values for different time lines from integer values

2
lib/obp60task/Pagedata.h
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@ -31,6 +31,8 @@ typedef struct{
double batteryVoltage300 = 0; // Sliding average over 300 values
double batteryCurrent300 = 0;
double batteryPower300 = 0;
double batteryLevelLiPo = 0; // Battery level for OBP40 LiPo accu
int BatteryChargeStatus = 0; // LiPo charge status: 0 = discharge, 1 = loading activ
double solarVoltage = 0;
double solarCurrent = 0;
double solarPower = 0;

6
lib/obp60task/platformio.ini
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@ -2,7 +2,9 @@
#if you want a pio run to only build
#your special environments you can set this here
#by uncommenting the next line
default_envs = obp60_s3
default_envs =
obp60_s3
obp40_s3
[env:obp60_s3]
platform = espressif32@6.8.1
@ -91,6 +93,8 @@ build_flags=
-D DISABLE_DIAGNOSTIC_OUTPUT #Disable diagnostic output for GxEPD2 lib
-D BOARD_OBP40S3 #Board OBP40 V1.0 with ESP32S3 SKU:DIE07300S (CrowPanel 4.2)
-D DISPLAY_GDEY042T81 #new E-Ink display from Waveshare, R10 2.2 ohm
-D LIPO_ACCU_1200 #Hardware extension, LiPo accu 3,7V 1200mAh
-D VOLTAGE_SENSOR #Hardware extension, LiPo voltage sensor with two resistors
${env.build_flags}
upload_port = /dev/ttyUSB0 #OBP40 download via external USB/Serail converter
upload_protocol = esptool #firmware upload via USB OTG seriell, by first upload need to set the ESP32-S3 in the upload mode with shortcut GND to Pin27