From 9bcf01312617570dab3a026ae64a0e0325bc0e43 Mon Sep 17 00:00:00 2001 From: pki791 Date: Tue, 3 Feb 2026 15:59:29 +0100 Subject: [PATCH] Fix Heltec Wireless Paper voltage Added ADC_MULTIPLIER (default=1) to v3 board. Added correct multiplier to ini of WP. --- variants/heltec_v3/HeltecV3Board.h | 5 ++++- variants/heltec_wireless_paper/platformio.ini | 1 + 2 files changed, 5 insertions(+), 1 deletion(-) diff --git a/variants/heltec_v3/HeltecV3Board.h b/variants/heltec_v3/HeltecV3Board.h index afdaf6398..f211a999e 100644 --- a/variants/heltec_v3/HeltecV3Board.h +++ b/variants/heltec_v3/HeltecV3Board.h @@ -11,6 +11,9 @@ #ifndef PIN_ADC_CTRL // set in platformio.ini for Heltec Wireless Tracker (2) #define PIN_ADC_CTRL 37 #endif +#ifndef ADC_MULTIPLIER //default ADC multiplier + #define ADC_MULTIPLIER 1 +#endif #define PIN_ADC_CTRL_ACTIVE LOW #define PIN_ADC_CTRL_INACTIVE HIGH @@ -88,7 +91,7 @@ class HeltecV3Board : public ESP32Board { digitalWrite(PIN_ADC_CTRL, !adc_active_state); - return (5.42 * (3.3 / 1024.0) * raw) * 1000; + return (5.42 * (3.3 / 1024.0) * raw) * 1000 * ADC_MULTIPLIER; } const char* getManufacturerName() const override { diff --git a/variants/heltec_wireless_paper/platformio.ini b/variants/heltec_wireless_paper/platformio.ini index f0bca8604..14870d950 100644 --- a/variants/heltec_wireless_paper/platformio.ini +++ b/variants/heltec_wireless_paper/platformio.ini @@ -21,6 +21,7 @@ build_flags = ;-D PIN_BOARD_SCL=18 ; same GPIO as P_LORA_TX_LED -D PIN_USER_BTN=0 -D PIN_VEXT_EN=45 + -D ADC_MULTIPLIER=1.55 -D PIN_VBAT_READ=20 -D PIN_ADC_CTRL=19 -D SX126X_DIO2_AS_RF_SWITCH=true