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https://github.com/MarekZegare4/MeshCore-Solo.git
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7ff1b7c86b
The per-read VBAT_ENABLE gating from4d46abb2(energy optimizations) powered the battery voltage divider HIGH for only 10ms before each ADC read, then LOW. 10ms is too short for the high-impedance divider node to settle before the nRF52 SAADC samples it, so readings came out high and inconsistent (e.g. 4.6-5.0V on a LiPo that maxes ~4.2V). Hold VBAT_ENABLE HIGH continuously again (as before4d46abb2) so the node is always settled at sample time, and drop the toggle + delay(10) from getBattMilliVolts(). Standby cost is ~2uA on the 2x1M divider, negligible next to the device's mA-level draw. The CPU-sleep and LED-off energy optimizations from4d46abb2are left untouched — those are the real savings; only the VBAT gating is reverted.
37 lines
1.0 KiB
C++
37 lines
1.0 KiB
C++
#include <Arduino.h>
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#include <Wire.h>
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#include "WioTrackerL1Board.h"
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void WioTrackerL1Board::begin() {
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NRF52BoardDCDC::begin();
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btn_prev_state = HIGH;
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pinMode(PIN_VBAT_READ, INPUT); // VBAT ADC input
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pinMode(VBAT_ENABLE, OUTPUT);
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digitalWrite(VBAT_ENABLE, HIGH); // voltage divider always on: gating it per-read left
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// the divider node unsettled at sample time (10ms was
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// too short), reading high & jittery. ~2uA standby cost.
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// Set all button pins to INPUT_PULLUP
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pinMode(PIN_BUTTON1, INPUT_PULLUP);
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pinMode(PIN_BUTTON2, INPUT_PULLUP);
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pinMode(PIN_BUTTON3, INPUT_PULLUP);
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pinMode(PIN_BUTTON4, INPUT_PULLUP);
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pinMode(PIN_BUTTON5, INPUT_PULLUP);
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pinMode(PIN_BUTTON6, INPUT_PULLUP);
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#if defined(PIN_WIRE_SDA) && defined(PIN_WIRE_SCL)
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Wire.setPins(PIN_WIRE_SDA, PIN_WIRE_SCL);
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#endif
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Wire.begin();
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#ifdef P_LORA_TX_LED
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pinMode(P_LORA_TX_LED, OUTPUT);
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digitalWrite(P_LORA_TX_LED, LOW);
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#endif
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delay(10); // give sx1262 some time to power up
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}
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