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Tom
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# Raspberry Pi Pico 2 + W5500 + E22-900M30S — Meshtastic Variant
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# Raspberry Pi Pico 2 + W5500 + E22-900M30S - Meshtastic Variant
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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.
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@@ -20,9 +20,9 @@ Meshtastic support for a **Raspberry Pi Pico 2** (RP2350, 4 MB flash) with an ex
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| GPIO | Function |
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| ---- | --------------------------------------- |
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| GP24 | VBUS sense — HIGH when USB is connected |
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| GP24 | VBUS sense - HIGH when USB is connected |
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| GP25 | User LED (heartbeat) |
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| GP29 | ADC3 — VSYS/3, measures supply voltage |
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| GP29 | ADC3 - VSYS/3, measures supply voltage |
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### W5500 Ethernet (SPI0)
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@@ -33,7 +33,7 @@ Meshtastic support for a **Raspberry Pi Pico 2** (RP2350, 4 MB flash) with an ex
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| SCK | GP18 |
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| MOSI | GP19 |
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| RST | GP20 |
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| INT | — (nc) |
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| INT | - (nc) |
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| VCC | 3.3V |
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| GND | GND |
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@@ -50,10 +50,10 @@ Meshtastic support for a **Raspberry Pi Pico 2** (RP2350, 4 MB flash) with an ex
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| RESET | GP15 | Active LOW reset |
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| DIO1 | GP14 | IRQ interrupt |
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| BUSY | GP2 | Module busy indicator |
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| RXEN | GP3 | LNA enable — held HIGH permanently |
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| RXEN | GP3 | LNA enable - held HIGH permanently |
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| TXEN | ← DIO2 | See wiring note below |
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| VCC | 3.3V | Add a 100 µF capacitor close to the module |
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| GND | GND | — |
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| GND | GND | - |
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> See `wiring.svg` in this directory for the full connection diagram.
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@@ -81,10 +81,10 @@ With this bridge in place, `SX126X_DIO2_AS_RF_SWITCH` causes the SX1262 to drive
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pio run -e pico2_w5500_e22
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```
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### Flash — BOOTSEL mode
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### Flash - BOOTSEL mode
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1. Hold the **BOOTSEL** button on the Pico 2.
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2. Connect USB to the PC — it appears as a `RPI-RP2` storage drive.
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2. Connect USB to the PC - it appears as a `RPI-RP2` storage drive.
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3. Copy the `.uf2` file:
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```text
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@@ -119,7 +119,7 @@ Services available once connected:
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## Technical notes
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### LoRa — RF control
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### LoRa - RF control
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| Define | Effect |
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| ------------------------------ | ----------------------------------------------------------- |
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@@ -128,7 +128,7 @@ Services available once connected:
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| `SX126X_DIO3_TCXO_VOLTAGE 1.8` | E22 TCXO controlled by DIO3 |
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| `-D EBYTE_E22_900M30S` | Sets `TX_GAIN_LORA=7`, max power 22 dBm |
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> RXEN and TXEN may both be HIGH simultaneously during TX — this is safe for the E22 RF switch.
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> RXEN and TXEN may both be HIGH simultaneously during TX - this is safe for the E22 RF switch.
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### Ethernet
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@@ -138,7 +138,7 @@ Services available once connected:
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### HW_VENDOR
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Mapped to `meshtastic_HardwareModel_PRIVATE_HW` — no dedicated model exists in the Meshtastic protobuf for this hardware combination yet.
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Mapped to `meshtastic_HardwareModel_PRIVATE_HW` - no dedicated model exists in the Meshtastic protobuf for this hardware combination yet.
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---
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@@ -22,7 +22,7 @@ lib_deps =
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${rp2350_base.lib_deps}
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${networking_base.lib_deps}
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${networking_extra.lib_deps}
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# Standard WIZnet Ethernet library — supports W5100/W5200/W5500 auto-detect
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# Standard WIZnet Ethernet library - supports W5100/W5200/W5500 auto-detect
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arduino-libraries/Ethernet@^2.0.2
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debug_build_flags = ${rp2350_base.build_flags}, -g
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@@ -1,5 +1,5 @@
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// Raspberry Pi Pico 2 + external W5500 Ethernet module + EBYTE E22-900M30S
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// RP2350 (4 MB flash) — wire modules to the GPIO pins listed below
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// RP2350 (4 MB flash) - wire modules to the GPIO pins listed below
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//
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// LoRa (SX1262 / E22-900M30S) on SPI1:
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// SCK=GP10 MOSI=GP11 MISO=GP12 CS=GP13
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@@ -11,7 +11,7 @@
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//
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// See wiring.svg in this directory for a complete connection diagram.
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// Community/DIY board — no dedicated Meshtastic HardwareModel
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// Community/DIY board - no dedicated Meshtastic HardwareModel
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#define PRIVATE_HW
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#define ARDUINO_ARCH_AVR
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@@ -20,20 +20,20 @@
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#define LED_POWER PIN_LED
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// Power monitoring
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// GP24: VBUS sense – HIGH when USB is present (digital read)
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// GP24: VBUS sense - HIGH when USB is present (digital read)
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// GP29: ADC3 measures VSYS/3 (200 kΩ / 100 kΩ divider, same as standard Pico 2)
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#define EXT_PWR_DETECT 24
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#define BATTERY_PIN 29
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#define ADC_MULTIPLIER 3.0
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#define BATTERY_SENSE_RESOLUTION_BITS 12
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// No real battery — suppress false "battery at 100%" while USB powers VSYS
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// No real battery - suppress false "battery at 100%" while USB powers VSYS
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#define NO_BATTERY_LEVEL_ON_CHARGE
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// Optional user button — connect a button between GP6 and GND
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// Optional user button - connect a button between GP6 and GND
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// #define BUTTON_PIN 6
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// #define BUTTON_NEED_PULLUP
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// GPS on UART1 (Serial2) — GP8 TX, GP9 RX
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// GPS on UART1 (Serial2) - GP8 TX, GP9 RX
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// GP8/GP9 belong to UART1, so we must use Serial2 (not the default Serial1/UART0).
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// GP0/GP1 (UART0 defaults) are free but the firmware treats pin 0 as "not configured".
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// GP4/GP5 occupied by I2C (SCL/SDA for BMP-280).
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