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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.
42 lines
1.1 KiB
C++
42 lines
1.1 KiB
C++
#pragma once
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#include <MeshCore.h>
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#include <Arduino.h>
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#include <helpers/NRF52Board.h>
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class WioTrackerL1Board : public NRF52BoardDCDC {
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protected:
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uint8_t btn_prev_state;
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public:
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WioTrackerL1Board() : NRF52Board("WioTrackerL1 OTA") {}
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void begin();
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#if defined(P_LORA_TX_LED)
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void onBeforeTransmit() override {
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digitalWrite(P_LORA_TX_LED, HIGH); // turn TX LED on
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}
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void onAfterTransmit() override {
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digitalWrite(P_LORA_TX_LED, LOW); // turn TX LED off
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}
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#endif
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uint16_t getBattMilliVolts() override {
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// VBAT_ENABLE is held HIGH continuously (see begin()/initVariant()) so the
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// divider node is already settled — don't gate it per-read, that reads high
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// and jittery because 10ms wasn't enough for the divider to stabilize.
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analogReadResolution(12);
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analogReference(AR_INTERNAL);
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int adcvalue = analogRead(PIN_VBAT_READ);
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return (adcvalue * ADC_MULTIPLIER * AREF_VOLTAGE) / 4.096;
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}
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const char* getManufacturerName() const override {
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return "Seeed Wio Tracker L1";
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}
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void powerOff() override {
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sd_power_system_off();
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}
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};
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