Toit

Hi there, <@918882589060792390> <@918505614055964742> thanks in advance for any help
Im building an app on Toit, running on an ESP32 is a TTGO TBeam v1.1 PCB, that holds a OLED screen.. i would like to add somewhere on screen an indicator that shows the battery level of the device, just like on a cell phone... may be a battery icon with some progress depeding on the battery charge and a percentage number.. is there an easy way on Toit to read the current battery charge out of the PCB?? That is my question, what i would need to know, also if you have some sample code will be sure helpful
Best, Diego

Just found a way... seems to work, thanks


import i2c
import gpio
import ..src.ttgo_tbeam

AXP192_I2C_ADDR := 0x34

main:

  bus := i2c.Bus
    --scl=(gpio.Pin TTGO_TBEAM_SCL)
    --sda=(gpio.Pin TTGO_TBEAM_SDA)
    --frequency=TTGO_TBEAM_I2C_FREQUENCY

  device := bus.device TTGO_TBEAM_DEVICE_AXP192

  while true:
    voltage_raw := read_register device 0x78 2
    voltage := ((voltage_raw >> 4) * 1.1) / 1000 

    print "Battery voltage: $(voltage) V"

    battery_percentage := ((voltage - 3.0) / (4.2 - 3.0)) * 100
    
    print "Battery charge: $(battery_percentage) %"

    sleep --ms=5000  // Espera antes de la próxima medición

read_register device reg length -> int:
  buf := device.registers.read_bytes reg length
  return (buf[0] << 8) | buf[1]