Expand description
Board support for the SenseCAP Solar Node P1 / P1-Pro (nRF52840 + SX1262).
Composes umsh-bsp-nrf52840 with
the Solar Node’s pinout and on-board peripherals. This is the fourth
nRF52840 + SX1262-class board, after the T-Echo, Wio Tracker L1,
and T1000-E; the radio path is byte-for-byte the Wio Tracker L1
configuration (external RXEN, DIO2-as-RF-switch, DIO3 TCXO at 1.8 V)
on a different pin map. The Platform bundle is
therefore a verbatim copy of the Wio Tracker’s.
The same crate is intended to cover both the P1 and the P1-Pro, which are believed to differ only in GNSS module and battery pack.
Initial scope is bringup only:
- USB-CDC handles (over the nRF native USB peripheral, chip BSP)
- two user LEDs and two buttons for identification (Phase 1)
- calibrated battery measurement (Phase 2)
- SX1262 LoRa radio + external RXEN pin (Phase 3)
- low-battery System OFF with LPCOMP solar recovery (Phase 6)—see
[
shutdown]
Future expansion (device-node behavior, GNSS) is welcome but is not yet implemented.
See docs/hardware/sensecap-solar-node-p1-pro-hardware.md for the
firmware-derived hardware reference.
§Pin map (nRF52840, from the Meshtastic seeed_solar_node variant)
The BSP and firmware hard-code the P0_xx / P1_xx embassy-nrf pins
directly; the Arduino logical numbers below appear only for
cross-referencing the vendor sources.
| Function | Logical | nRF pin | Notes |
|---|---|---|---|
| GNSS standby/wake | 0 | P0.02 | polarity unverified |
| Radio DIO1 | 1 | P0.03 | |
| Radio RESET | 2 | P0.28 | |
| Radio BUSY | 3 | P0.29 | |
| Radio CS | 4 | P0.04 | |
| Radio RXEN | 5 | P0.05 | drive LOW at boot, then rf_switch_rx |
| GNSS UART TX (MCU→L76K) | 6 | P1.11 | NMEA 9600 |
| GNSS UART RX (L76K→MCU) | 7 | P1.12 | |
| Radio SPI SCK | 8 | P1.13 | |
| Radio SPI MISO | 9 | P1.14 | |
| Radio SPI MOSI | 10 | P1.15 | |
| LED_A (“User LED”) | 11 | P0.15 | white, active-high (confirmed 2026-07-23) |
| LED_B (“Breathing”/TX LED) | 12 | P0.19 | blue, active-high (confirmed); heartbeat LED |
| PWR button (USER_BUTTON) | 13 | P1.01 | active-low, internal pull-up (confirmed); hold → System OFF. A press from System OFF reaches the bootloader, not the application |
| Grove SDA | 14 | P0.09 | NFC pin—NFCT off / UICR NFCPINS cleared for GPIO |
| Grove SCL | 15 | P0.10 | NFC pin, ditto |
| Battery ADC | 16 | P0.31/AIN7 | Phase 2 |
| GNSS RESET (candidate) | 17 | P1.03 | never driven—input only until characterized |
| GNSS ENABLE | 18 | P1.05 | likely active-high; held inactive in bringup |
| Battery divider enable (n) | 19 | P0.14 | active-low per MeshCore, verify (Phase 2) |
| USR button (USER_BUTTON_2) | 20 | P1.07 | active-low, pull-up (confirmed); soft—pressing it does NOT cut the MCU rail. The only button that powers the node on |
| QSPI flash (P25Q16H) | 21–26 | see hw doc | reserved, unused (NV store is internal NVMC) |
Constants§
- USB
- What the stock Solar P1 application reports; its bootloader is
2886:0044.