improve support for Heltec Wireless Bridge

Author: berlincount

src/sleep.cpp

@@ -332,7 +332,7 @@ void doDeepSleep(uint32_t msecToWake, bool skipPreflight = false, bool skipSaveN
     }
 #endif
 
-#if defined(ARCH_ESP32) && defined(I2C_SDA)
+#if !MESHTASTIC_EXCLUDE_I2C && defined(ARCH_ESP32) && defined(I2C_SDA)
     // Added by https://github.com/meshtastic/firmware/pull/4418
     // Possibly to support Heltec Capsule Sensor?
     Wire.end();
@@ -542,4 +542,4 @@ void enableLoraInterrupt()
     }
 #endif
 }
-#endif
+#endif

variants/heltec_wireless_bridge/platformio.ini

@@ -3,4 +3,21 @@
 extends = esp32_base
 board = heltec_wifi_lora_32
 build_flags = 
-  ${esp32_base.build_flags} -D HELTEC_WIRELESS_BRIDGE -I variants/heltec_wireless_bridge
+  ${esp32_base.build_flags}
+  -I variants/heltec_wireless_bridge
+  -D HELTEC_WIRELESS_BRIDGE
+  -D BOARD_HAS_PSRAM
+  -D RADIOLIB_EXCLUDE_LR11X0=1
+  -D RADIOLIB_EXCLUDE_SX128X=1
+  -D MESHTASTIC_EXCLUDE_CANNEDMESSAGES=1
+  -D MESHTASTIC_EXCLUDE_DETECTIONSENSOR=1
+  -D MESHTASTIC_EXCLUDE_ENVIRONMENTAL_SENSOR=1
+  -D MESHTASTIC_EXCLUDE_ENVIRONMENTAL_SENSOR_EXTERNAL=1
+  -D MESHTASTIC_EXCLUDE_EXTERNALNOTIFICATION=1
+  -D MESHTASTIC_EXCLUDE_GPS=1
+  -D MESHTASTIC_EXCLUDE_I2C=1
+  -D MESHTASTIC_EXCLUDE_INPUTBROKER=1
+  -D MESHTASTIC_EXCLUDE_POWER_FSM=1
+  -D MESHTASTIC_EXCLUDE_SERIAL=1
+  -D MESHTASTIC_EXCLUDE_SCREEN=1
+  -D MESHTASTIC_EXCLUDE_WAYPOINT=1

variants/heltec_wireless_bridge/variant.h

@@ -1,29 +1,41 @@
-// the default ESP32 Pin of 15 is the Oled SCL, set to 36 and 37 and works fine.
-// Tested on Neo6m module.
+
+// updated variant 20250420 berlincount, tested with HTIT-TB
+//
+// connections in HTIT-WB
+// per https://www.espressif.com/sites/default/files/documentation/esp32_datasheet_en.pdf
+// md5: a0e6ae10ff76611aa61433366b2e4f5c  esp32_datasheet_en.pdf
+// per https://resource.heltec.cn/download/Wireless_Bridge/Schematic_Diagram_HTIT-WB_V0.2.pdf
+// md5: d5c1b0219ece347dd8cee866d7d3ab0a  Schematic_Diagram_HTIT-WB_V0.2.pdf
+
+#define NO_EXT_GPIO 1
+#define NO_GPS 1
+
+#define HAS_GPS 0     // GPS is not equipped
 #undef GPS_RX_PIN
 #undef GPS_TX_PIN
-#define GPS_RX_PIN 36
-#define GPS_TX_PIN 33
-
-#ifndef USE_JTAG  // gpio15 is TDO for JTAG, so no I2C on this board while doing jtag
-#define I2C_SDA 4 // I2C pins for this board
-#define I2C_SCL 15
-#endif
 
-#define LED_PIN 25   // If defined we will blink this LED
-#define BUTTON_PIN 0 // If defined, this will be used for user button presses
+// Green / Lora = PIN 22 / GPIO2, Yellow / Wifi = PIN 23 / GPIO0, Blue / BLE = PIN 25 / GPIO16
+#define LED_PIN  22
+#define WIFI_LED 23
+#define BLE_LED  25
 
+// ESP32-D0WDQ6 direct pins SX1276
 #define USE_RF95
-#define LORA_DIO0 26 // a No connect on the SX1262 module
+#define LORA_DIO0 26
+#define LORA_DIO1 35
+#define LORA_DIO2 34
+#define LORA_SCK  05
+#define LORA_MISO 19
+#define LORA_MOSI 27
+#define LORA_CS   18
+
+// several things are not possible with JTAG enabled
 #ifndef USE_JTAG
-#define LORA_RESET 14
+#define LORA_RESET 14 // LoRa Reset shares a pin with MTMS
+#define I2C_SDA 4     // SD_DATA1 going to W25Q64, but
+#define I2C_SCL 15    // SD_CMD shared a pin with MTD0
 #endif
-#define LORA_DIO1 35
-#define LORA_DIO2 34 // Not really used
 
-// ratio of voltage divider = 3.20 (R1=100k, R2=220k)
-#define ADC_MULTIPLIER 3.2
+// user button is present on device, but currently untested & unconfigured - couldn't figure out how it's connected
 
-#define BATTERY_PIN 13 // A battery voltage measurement pin, voltage divider connected here to measure battery voltage
-#define ADC_CHANNEL ADC2_GPIO13_CHANNEL
-#define BAT_MEASURE_ADC_UNIT 2
+// battery support is present within device, but currently untested & unconfigured - couldn't find reliable information yet