Standalone GPS beacon mode: when no KISS host is connected for 15s,
the RNode transmits position and battery telemetry over LoRa.
Two beacon paths:
- LXMF (recommended): encrypted per-packet messages with announces,
compatible with Sideband and any LXMF application. Supports IFAC
network authentication.
- Legacy JSON: plaintext or encrypted raw packets for simple collectors.
Key changes:
- GPS support for T-Beam Supreme S3 (L76K) and Heltec V4 (external)
- SX1262 radio fixes: IQ polarity, DCD preamble lockup, RX reliability
- LXMF identity management with NVS-backed Ed25519/X25519 keys
- IFAC authentication (CMD_IFAC_KEY 0x89) for private networks
- Per-channel serial isolation (USB, BLE, WiFi)
- GPS status page in OLED display rotation
- Provisioning via rnlog: provision-lxmf, provision-ifac
- Documentation in Documentation/BEACON.md
Fix for critical Issue: GPIO 36 on the ESP32 is an input-only pin (part of the ADC1 group along with GPIO 34, 35, and 39). This is a hardware limitation of the ESP32 microcontroller. These pins cannot be configured as outputs.
This means the current pin assignment in the firmware will not work correctly for the reset functionality, as pinMode(_reset, OUTPUT) and digitalWrite(_reset, LOW/HIGH) calls will fail to actually drive the pin. The reset pin for a generic ESP32 board should be reassigned to a GPIO that supports output mode (any GPIO that is not 34, 35, 36, or 39).
This appears to be a configuration error in the board definition that would prevent proper initialization of the SX1278 LoRa module on these board configurations.
// there are three version of V3: V3, V3.1, and V3.2
// V3 and V3.1 have a pull up on pin_ctrl and are active low
// V3.2 has a transistor and active high
// put the pin input mode and read it. if it's high, we have V3 or V3.1
// other wise, it's a V3.2
Also, changed the min, max, float values for V3 boards. From what I can see, most are sold with
a battery like this: https://www.amazon.com/dp/B0D3LMQSGL
These batteries advertise a min voltage of 3 and max of 4. Float should be a tiny bit below Max.
