Initial commit: Simple Sensor firmware for Heltec T114 with BME280

- 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

variants/tiny_relay/platformio.ini

@@ -0,0 +1,50 @@
+[Tiny_Relay]
+extends = stm32_base
+board = tiny_relay
+board_upload.maximum_size = 229376 ; 32kb for FS
+build_flags = ${stm32_base.build_flags}
+  -D RADIO_CLASS=CustomSTM32WLx
+  -D WRAPPER_CLASS=CustomSTM32WLxWrapper
+  -D SPI_INTERFACES_COUNT=0
+  -D RX_BOOSTED_GAIN=true
+;  -D STM32WL_TCXO_VOLTAGE=1.6 ; defaults to 0 if undef
+;  -D LORA_TX_POWER=14 ; Defaults to 22 for HP, 14 is for LP version
+  -D LORA_TX_POWER=22 ; Enable 22dBm transmission
+  -D MAX_LORA_TX_POWER=22 ; Allow setting up to 22dBm in companion radio
+  -I variants/tiny_relay
+build_src_filter = ${stm32_base.build_src_filter}
+  +<../variants/tiny_relay>
+
+[env:Tiny_Relay_repeater]
+extends = Tiny_Relay
+build_flags = ${Tiny_Relay.build_flags}
+  -D ADVERT_NAME='"tiny_relay Repeater"'
+  -D ADVERT_LAT=0.0
+  -D ADVERT_LON=0.0
+  -D ADMIN_PASSWORD='"password"'
+  -D MAX_NEIGHBOURS=50
+build_src_filter = ${Tiny_Relay.build_src_filter}
+  +<../examples/simple_repeater>
+
+[env:Tiny_Relay_sensor]
+extends = Tiny_Relay
+build_flags = ${Tiny_Relay.build_flags}
+  -D ADVERT_NAME='"tiny_relay Sensor"'
+  -D ADVERT_LAT=0.0
+  -D ADVERT_LON=0.0
+  -D ADMIN_PASSWORD='"password"'
+  -D MAX_NEIGHBOURS=50
+build_src_filter = ${Tiny_Relay.build_src_filter}
+  +<../examples/simple_sensor>
+
+[env:Tiny_Relay_companion_radio_usb]
+extends = Tiny_Relay
+build_flags = ${Tiny_Relay.build_flags}
+;  -D FORMAT_FS=true
+  -D MAX_CONTACTS=100
+  -D MAX_GROUP_CHANNELS=8
+  -D MAX_LORA_TX_POWER=22
+build_src_filter = ${Tiny_Relay.build_src_filter}
+  +<../examples/companion_radio/*.cpp>
+lib_deps = ${Tiny_Relay.lib_deps}
+  densaugeo/base64 @ ~1.4.0