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- MeshCore-based Simple Sensor firmware - Heltec T114 without display - BME280 sensor support (temp/humidity/pressure) - Radio: 868.856018 MHz, SF7, BW62.5 kHz, CR4/7 - 2-byte path hash - PlatformIO project
97 lines
2.4 KiB
C
97 lines
2.4 KiB
C
// LilyGo T-Beam-1W variant.h
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// Configuration based on Meshtastic PR #8967 and LilyGO documentation
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#pragma once
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// I2C for OLED display (SH1106 at 0x3C)
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#define I2C_SDA 8
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#define I2C_SCL 9
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// GPS - Quectel L76K
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// GNSS_TXD (IO5) = GPS transmits → MCU RX (setPins rxPin)
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// GNSS_RXD (IO6) = GPS receives → MCU TX (setPins txPin)
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#define PIN_GPS_TX 5 // MCU receives from GPS TX
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#define PIN_GPS_RX 6 // MCU transmits to GPS RX
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#define PIN_GPS_PPS 7 // GPS PPS output
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#define PIN_GPS_EN 16 // GPS wake-up/enable (GPS_EN_PIN in LilyGO code)
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#define HAS_GPS 1
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#define GPS_BAUDRATE 9600
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// Buttons
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#define BUTTON_PIN 0 // BUTTON 1 (boot)
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#define BUTTON_PIN_ALT 17 // BUTTON 2
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// SPI (shared by LoRa and SD)
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#define SPI_MOSI 11
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#define SPI_SCK 13
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#define SPI_MISO 12
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#define SPI_CS 10
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// SD Card
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#define HAS_SDCARD
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#define SDCARD_USE_SPI1
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#define SDCARD_CS SPI_CS
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// LoRa Radio - SX1262 with 1W PA
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#define USE_SX1262
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#define LORA_SCK SPI_SCK
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#define LORA_MISO SPI_MISO
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#define LORA_MOSI SPI_MOSI
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#define LORA_CS 15
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#define LORA_RESET 3
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#define LORA_DIO1 1
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#define LORA_BUSY 38
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// CRITICAL: Radio power enable - MUST be HIGH before lora.begin()!
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// GPIO 40 powers the SX1262 + PA module via LDO
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#define SX126X_POWER_EN 40
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#ifdef USE_SX1262
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#define SX126X_CS LORA_CS
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#define SX126X_DIO1 LORA_DIO1
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#define SX126X_BUSY LORA_BUSY
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#define SX126X_RESET LORA_RESET
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// RF switching configuration for 1W PA module
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// DIO2 controls PA (via SX126X_DIO2_AS_RF_SWITCH)
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// CTRL PIN (GPIO 21) controls LNA - must be HIGH during RX
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// Truth table: DIO2=1,CTRL=0 -> TX (PA on, LNA off)
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// DIO2=0,CTRL=1 -> RX (PA off, LNA on)
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#define SX126X_DIO2_AS_RF_SWITCH
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#define SX126X_RXEN 21 // LNA enable - HIGH during RX
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// TCXO voltage - required for radio init
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#define SX126X_DIO3_TCXO_VOLTAGE 3.0
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#define SX126X_MAX_POWER 22
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#endif
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// LED
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#define LED_PIN 18
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#define LED_STATE_ON 1 // HIGH = ON
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// Battery ADC
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#define BATTERY_PIN 4
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#define ADC_CHANNEL ADC1_GPIO4_CHANNEL
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#define BATTERY_SENSE_SAMPLES 30
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#define ADC_MULTIPLIER 3.0
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// NTC temperature sensor
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#define NTC_PIN 14
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// Fan control
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#define FAN_CTRL_PIN 41
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// PA Ramp Time - T-Beam 1W requires >800us stabilization (default is 200us)
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// Value 0x05 = RADIOLIB_SX126X_PA_RAMP_800U
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#define SX126X_PA_RAMP_US 0x05
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// Display - SH1106 OLED (128x64)
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#define USE_SH1106
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#define OLED_WIDTH 128
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#define OLED_HEIGHT 64
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// 32768 Hz crystal present
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#define HAS_32768HZ 1
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