Exercises 00 & 01 working, Documentation still in progress, moving to my source control server.

shared/boards/tbeam-s3-core/pins_arduino.h

@@ -0,0 +1,42 @@
+#ifndef Pins_Arduino_h
+#define Pins_Arduino_h
+
+#include <stdint.h>
+
+#define USB_VID 0x303a
+#define USB_PID 0x1001
+
+// Now declared in .platformio/packages/framework-arduinoespressif32/cores/esp32/Arduino.h
+// #define NUM_ANALOG_INPUTS 20
+// #define EXTERNAL_NUM_INTERRUPTS 46
+// #define NUM_DIGITAL_PINS 48
+// #define analogInputToDigitalPin(p) (((p) < 20) ? (analogChannelToDigitalPin(p)) : -1)
+// #define digitalPinToInterrupt(p) (((p) < 48) ? (p) : -1)
+// #define digitalPinHasPWM(p) (p < 46)
+
+static const uint8_t TX = 43;
+static const uint8_t RX = 44;
+
+// The default Wire will be mapped to PMU and RTC
+static const uint8_t SDA = 42;
+static const uint8_t SCL = 41;
+
+// Default SPI will be mapped to Radio
+static const uint8_t SS = 10;
+static const uint8_t MOSI = 11;
+static const uint8_t MISO = 13;
+static const uint8_t SCK = 12;
+
+// Another SPI bus shares SD card and QMI8653 inertial measurement sensor
+#define SPI_MOSI (35)
+#define SPI_SCK (36)
+#define SPI_MISO (37)
+#define SPI_CS (47)
+#define IMU_CS (34)
+
+#define SDCARD_CS SPI_CS
+#define IMU_INT (33)
+// #define PMU_IRQ                  (40)
+#define RTC_INT (14)
+
+#endif /* Pins_Arduino_h */

shared/boards/tbeam-s3-core/platformio.ini

@@ -0,0 +1,26 @@
+; The 1.0 release of the LilyGo TBEAM-S3-Core board 
+[env:tbeam-s3-core]
+custom_meshtastic_hw_model = 12
+custom_meshtastic_hw_model_slug = LILYGO_TBEAM_S3_CORE
+custom_meshtastic_architecture = esp32-s3
+custom_meshtastic_actively_supported = true
+custom_meshtastic_support_level = 1
+custom_meshtastic_display_name = LILYGO T-Beam Supreme
+custom_meshtastic_images = tbeam-s3-core.svg
+custom_meshtastic_tags = LilyGo
+custom_meshtastic_requires_dfu = true
+custom_meshtastic_partition_scheme = 8MB
+
+extends = esp32s3_base
+board = tbeam-s3-core
+board_build.partitions = default_8MB.csv
+board_check = true
+
+lib_deps =
+  ${esp32s3_base.lib_deps}
+  # renovate: datasource=custom.pio depName=SensorLib packageName=lewisxhe/library/SensorLib
+  lewisxhe/SensorLib@0.3.4
+
+build_flags = 
+  ${esp32s3_base.build_flags} 
+  -I variants/esp32s3/tbeam-s3-core

shared/boards/tbeam-s3-core/provenance.txt

@@ -0,0 +1,6 @@
+2/12/2026 copied from meshastic/firmware/variants/esp32s3/tbeam-s3-core
+since that appeared in the build tree of a successfully operating binary:
+jlpoole@jp /usr/local/src/meshtastic/firmware $ cd /usr/local/src/meshtastic/firmware
+ls -1 .pio/build 2>/dev/null | egrep -i 'tbeam|t-beam|s3' | sort
+tbeam-s3-core
+jlpoole@jp /usr/local/src/meshtastic/firmware $

shared/boards/tbeam-s3-core/rfswitch.h

@@ -0,0 +1,11 @@
+#include "RadioLib.h"
+
+static const uint32_t rfswitch_dio_pins[] = {RADIOLIB_LR11X0_DIO5, RADIOLIB_LR11X0_DIO6, RADIOLIB_NC, RADIOLIB_NC, RADIOLIB_NC};
+
+static const Module::RfSwitchMode_t rfswitch_table[] = {
+    // mode                  DIO5  DIO6
+    {LR11x0::MODE_STBY, {LOW, LOW}},  {LR11x0::MODE_RX, {HIGH, LOW}},
+    {LR11x0::MODE_TX, {LOW, HIGH}},   {LR11x0::MODE_TX_HP, {LOW, HIGH}},
+    {LR11x0::MODE_TX_HF, {LOW, LOW}}, {LR11x0::MODE_GNSS, {LOW, LOW}},
+    {LR11x0::MODE_WIFI, {LOW, LOW}},  END_OF_MODE_TABLE,
+};

shared/boards/tbeam-s3-core/variant.h

@@ -0,0 +1,79 @@
+// #define BUTTON_NEED_PULLUP // if set we need to turn on the internal CPU pullup during sleep
+
+#define I2C_SDA1 42 // Used for PMU management and PCF8563
+#define I2C_SCL1 41 // Used for PMU management and PCF8563
+
+#define I2C_SDA 17 // For QMC6310 sensors and screens
+#define I2C_SCL 18 // For QMC6310 sensors and screens
+
+#define BUTTON_PIN 0 // The middle button GPIO on the T-Beam S3
+//  #define EXT_NOTIFY_OUT 13 // Default pin to use for Ext Notify Module.
+
+#define LED_STATE_ON 0 // State when LED is lit
+
+// TTGO uses a common pinout for their SX1262 vs RF95 modules - both can be enabled and we will probe at runtime for RF95 and if
+// not found then probe for SX1262
+#define USE_SX1262
+#define USE_SX1268
+#define USE_LR1121
+
+#define LORA_DIO0 -1 // a No connect on the SX1262 module
+#define LORA_RESET 5
+#define LORA_DIO1 1 // SX1262 IRQ
+#define LORA_DIO2 4 // SX1262 BUSY
+#define LORA_DIO3   // Not connected on PCB, but internally on the TTGO SX1262, if DIO3 is high the TXCO is enabled
+
+#ifdef USE_SX1262
+#define SX126X_CS 10 // FIXME - we really should define LORA_CS instead
+#define SX126X_DIO1 LORA_DIO1
+#define SX126X_BUSY LORA_DIO2
+#define SX126X_RESET LORA_RESET
+// Not really an E22 but TTGO seems to be trying to clone that
+#define SX126X_DIO2_AS_RF_SWITCH
+#define SX126X_DIO3_TCXO_VOLTAGE 1.8
+// Internally the TTGO module hooks the SX1262-DIO2 in to control the TX/RX switch (which is the default for the sx1262interface
+// code)
+#endif
+
+// LR1121
+#ifdef USE_LR1121
+#define LR1121_IRQ_PIN 1
+#define LR1121_NRESET_PIN LORA_RESET
+#define LR1121_BUSY_PIN 4
+#define LR1121_SPI_NSS_PIN 10
+#define LR1121_SPI_SCK_PIN 12
+#define LR1121_SPI_MOSI_PIN 11
+#define LR1121_SPI_MISO_PIN 13
+#define LR11X0_DIO3_TCXO_VOLTAGE 3.0
+#define LR11X0_DIO_AS_RF_SWITCH
+#endif
+
+// Leave undefined to disable our PMU IRQ handler.  DO NOT ENABLE THIS because the pmuirq can cause sperious interrupts
+// and waking from light sleep
+// #define PMU_IRQ 40
+#define HAS_AXP2101
+
+// PCF8563 RTC Module
+#define PCF8563_RTC 0x51
+
+// Specify the PMU as Wire1. In the t-beam-s3 core, PCF8563 and PMU share the bus
+#define PMU_USE_WIRE1
+#define RTC_USE_WIRE1
+
+#define LORA_SCK 12
+#define LORA_MISO 13
+#define LORA_MOSI 11
+#define LORA_CS 10
+
+#define GPS_RX_PIN 9
+#define GPS_TX_PIN 8
+#define GPS_WAKEUP_PIN 7
+#define GPS_1PPS_PIN 6
+
+#define HAS_SDCARD // Have SPI interface SD card slot
+#define SDCARD_USE_SPI1
+
+// has 32768 Hz crystal
+#define HAS_32768HZ 1
+
+#define USE_SH1106