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Fixed reading of battery voltage for Heltec V3.2. Comments from the code:

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// there are three version of V3: V3, V3.1, and V3.2
    // V3 and V3.1 have a pull up on pin_ctrl and are active low
    // V3.2 has a transistor and active high
    // put the pin input mode and read it.  if it's high, we have V3 or V3.1
    // other wise, it's a V3.2

Also, changed the min, max, float values for V3 boards.  From what I can see, most are sold with
a battery like this:  https://www.amazon.com/dp/B0D3LMQSGL
These batteries advertise a min voltage of 3 and max of 4.  Float should be a tiny bit below Max.
This commit is contained in:
Alligitor 2025-04-24 00:09:33 +00:00
parent 23c580d0df
commit 828623c70c
1 changed files with 22 additions and 5 deletions
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27
Power.h
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@ -95,10 +95,10 @@
float bat_delay_v = 0;
float bat_state_change_v = 0;
#elif BOARD_MODEL == BOARD_HELTEC32_V3
#define BAT_V_MIN 3.15
#define BAT_V_MAX 4.3
#define BAT_V_CHG 4.48
#define BAT_V_FLOAT 4.33
#define BAT_V_MIN 3.05
#define BAT_V_MAX 4.0
#define BAT_V_CHG 4.1
#define BAT_V_FLOAT 3.95
#define BAT_SAMPLES 7
const uint8_t pin_vbat = 1;
const uint8_t pin_ctrl = 37;
@ -348,8 +348,25 @@ bool init_pmu() {
pinMode(pin_vbat, INPUT);
return true;
#elif BOARD_MODEL == BOARD_HELTEC32_V3
// there are three version of V3: V3, V3.1, and V3.2
// V3 and V3.1 have a pull up on pin_ctrl and are active low
// V3.2 has a transistor and active high
// put the pin input mode and read it. if it's high, we have V3 or V3.1
// other wise, it's a V3.2
uint16_t pin_ctrl_value;
uint8_t pin_ctrl_active = LOW;
pinMode(pin_ctrl, INPUT);
pin_ctrl_value = digitalRead(pin_ctrl);
if(pin_ctrl_value == HIGH) {
// We have either a V3 or V3.1
pin_ctrl_active = LOW;
}
else {
// We have a V3.2
pin_ctrl_active = HIGH;
}
pinMode(pin_ctrl,OUTPUT);
digitalWrite(pin_ctrl, LOW);
digitalWrite(pin_ctrl, pin_ctrl_active);
return true;
#elif BOARD_MODEL == BOARD_HELTEC_T114
pinMode(pin_ctrl,OUTPUT);