From 2cb3a29fa86971fceab26ac72f229316b40b474b Mon Sep 17 00:00:00 2001 From: entr0p1 <1475255+entr0p1@users.noreply.github.com> Date: Tue, 30 Jun 2026 16:55:16 +1000 Subject: [PATCH] SX1262 LDO Support - Added build flag "SX126X_USE_REGULATOR_LDO" (set to 1 to enable) to use LDO for the SX1262 radio instead of DC-DC when the DCDC pin isn't wired up (e.g. t-echo lite) - Added additional debug mode diagnostic messages during SX1262 init to better highlight faults --- src/helpers/radiolib/CustomSX1262.h | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) diff --git a/src/helpers/radiolib/CustomSX1262.h b/src/helpers/radiolib/CustomSX1262.h index ad20122902..ca62fc26af 100644 --- a/src/helpers/radiolib/CustomSX1262.h +++ b/src/helpers/radiolib/CustomSX1262.h @@ -1,6 +1,7 @@ #pragma once #include +#include "MeshCore.h" #define SX126X_IRQ_HEADER_VALID 0b0000010000 // 4 4 valid LoRa header received #define SX126X_IRQ_PREAMBLE_DETECTED 0x04 @@ -27,6 +28,14 @@ class CustomSX1262 : public SX1262 { uint8_t cr = 5; #endif + #ifdef SX126X_USE_REGULATOR_LDO + constexpr bool useRegulatorLDO = SX126X_USE_REGULATOR_LDO; + #else + constexpr bool useRegulatorLDO = false; + #endif + + MESH_DEBUG_PRINTLN("SX1262 regulator requested: %s", useRegulatorLDO ? "LDO" : "DC-DC"); + #if defined(P_LORA_SCLK) #ifdef NRF52_PLATFORM if (spi) { spi->setPins(P_LORA_MISO, P_LORA_SCLK, P_LORA_MOSI); spi->begin(); } @@ -42,11 +51,12 @@ class CustomSX1262 : public SX1262 { if (spi) spi->begin(P_LORA_SCLK, P_LORA_MISO, P_LORA_MOSI); #endif #endif - int status = begin(LORA_FREQ, LORA_BW, LORA_SF, cr, RADIOLIB_SX126X_SYNC_WORD_PRIVATE, LORA_TX_POWER, 16, tcxo); + int status = begin(LORA_FREQ, LORA_BW, LORA_SF, cr, RADIOLIB_SX126X_SYNC_WORD_PRIVATE, LORA_TX_POWER, 16, tcxo, useRegulatorLDO); // if radio init fails with -707/-706, try again with tcxo voltage set to 0.0f if (status == RADIOLIB_ERR_SPI_CMD_FAILED || status == RADIOLIB_ERR_SPI_CMD_INVALID) { + MESH_DEBUG_PRINTLN("SX1262 init failed with error %d, retrying with TCXO at 0.0V", status); tcxo = 0.0f; - status = begin(LORA_FREQ, LORA_BW, LORA_SF, cr, RADIOLIB_SX126X_SYNC_WORD_PRIVATE, LORA_TX_POWER, 16, tcxo); + status = begin(LORA_FREQ, LORA_BW, LORA_SF, cr, RADIOLIB_SX126X_SYNC_WORD_PRIVATE, LORA_TX_POWER, 16, tcxo, useRegulatorLDO); } if (status != RADIOLIB_ERR_NONE) { Serial.print("ERROR: radio init failed: "); @@ -83,6 +93,8 @@ class CustomSX1262 : public SX1262 { writeRegister(0x8B5, &r_data, 1); #endif + MESH_DEBUG_PRINTLN("SX1262 status=0x%02X device_errors=0x%04X", getStatus(), getDeviceErrors()); + return true; // success }