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2026-07-01 19:01:27 -05:00
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variants/rp2350/diy/pico2_w5500_e22/README.md
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# Raspberry Pi Pico 2 + W5500 + E22-900M30S — Meshtastic Variant
# Raspberry Pi Pico 2 + W5500 + E22-900M30S - Meshtastic Variant
Meshtastic support for a **Raspberry Pi Pico 2** (RP2350, 4 MB flash) with an external **W5500** Ethernet module and an **EBYTE E22-900M30S** LoRa module.
@@ -20,9 +20,9 @@ Meshtastic support for a **Raspberry Pi Pico 2** (RP2350, 4 MB flash) with an ex
| GPIO | Function |
| ---- | --------------------------------------- |
| GP24 | VBUS sense — HIGH when USB is connected |
| GP24 | VBUS sense - HIGH when USB is connected |
| GP25 | User LED (heartbeat) |
| GP29 | ADC3 — VSYS/3, measures supply voltage |
| GP29 | ADC3 - VSYS/3, measures supply voltage |
### W5500 Ethernet (SPI0)
@@ -33,7 +33,7 @@ Meshtastic support for a **Raspberry Pi Pico 2** (RP2350, 4 MB flash) with an ex
| SCK | GP18 |
| MOSI | GP19 |
| RST | GP20 |
| INT | — (nc) |
| INT | - (nc) |
| VCC | 3.3V |
| GND | GND |
@@ -50,10 +50,10 @@ Meshtastic support for a **Raspberry Pi Pico 2** (RP2350, 4 MB flash) with an ex
| RESET | GP15 | Active LOW reset |
| DIO1 | GP14 | IRQ interrupt |
| BUSY | GP2 | Module busy indicator |
| RXEN | GP3 | LNA enable — held HIGH permanently |
| RXEN | GP3 | LNA enable - held HIGH permanently |
| TXEN | ← DIO2 | See wiring note below |
| VCC | 3.3V | Add a 100 µF capacitor close to the module |
| GND | GND | — |
| GND | GND | - |
> See `wiring.svg` in this directory for the full connection diagram.
@@ -81,10 +81,10 @@ With this bridge in place, `SX126X_DIO2_AS_RF_SWITCH` causes the SX1262 to drive
pio run -e pico2_w5500_e22
```
### Flash — BOOTSEL mode
### Flash - BOOTSEL mode
1. Hold the **BOOTSEL** button on the Pico 2.
2. Connect USB to the PC — it appears as a `RPI-RP2` storage drive.
2. Connect USB to the PC - it appears as a `RPI-RP2` storage drive.
3. Copy the `.uf2` file:
```text
@@ -119,7 +119,7 @@ Services available once connected:
## Technical notes
### LoRa — RF control
### LoRa - RF control
| Define | Effect |
| ------------------------------ | ----------------------------------------------------------- |
@@ -128,7 +128,7 @@ Services available once connected:
| `SX126X_DIO3_TCXO_VOLTAGE 1.8` | E22 TCXO controlled by DIO3 |
| `-D EBYTE_E22_900M30S` | Sets `TX_GAIN_LORA=7`, max power 22 dBm |
> RXEN and TXEN may both be HIGH simultaneously during TX — this is safe for the E22 RF switch.
> RXEN and TXEN may both be HIGH simultaneously during TX - this is safe for the E22 RF switch.
### Ethernet
@@ -138,7 +138,7 @@ Services available once connected:
### HW_VENDOR
Mapped to `meshtastic_HardwareModel_PRIVATE_HW` — no dedicated model exists in the Meshtastic protobuf for this hardware combination yet.
Mapped to `meshtastic_HardwareModel_PRIVATE_HW` - no dedicated model exists in the Meshtastic protobuf for this hardware combination yet.
---