Mesh-PI is, as far as I know, the smallest SX1262 LoRa board ever made for the Raspberry Pi. It's built around the ultra-small 10×10 mm Ebyte E22-900MM22S (Semtech SX1262, 868/915 MHz) module.

It's designed to run Meshtastic with the Linux-native daemon meshtasticd, but since it's just a plain SX1262 on the SPI bus, it works with any LoRa / LoRa-mesh stack — Meshtastic, Reticulum / RNode, your own RadioLib project… Ideal for a compact, always-on router / MQTT gateway node, with the full power of Linux behind it: SSH, MQTT, Home Assistant, scripting…

Features

Version 1.0

• Ebyte E22-900MM22S module — SX1262, 868/915 MHz ISM, up to 22 dBm
• u.FL antenna connector — or solder an edge-mount SMA connector / wire antenna instead
• 2 status LEDs (Green = OK, Red = fault) driven from GPIO
• Powered straight from the Pi 3.3 V rail, with proper bulk + low-ESR decoupling (100 µF tantalum + 47 µF MLCC + 100 nF)
• Designed for meshtasticd (Meshtastic Linux-native)
• Perflectly sized to fit on Pi Zero

Design choices Mesh-PI is deliberately minimal and purpose-built for a static router node — small, cheap, efficient, and it does exactly that job, perfectly.

No GPS — on purpose. Dropped to save space and cost. A fixed router doesn't move, so its location is set once as a fixed position in Meshtastic; an on-board GPS would only add size, price and power draw for nothing. 22 dBm — on purpose. The board uses the SX1262's native 22 dBm rather than a 1 W (30 dBm) amplified front-end. Going 1 W would mean tapping the Pi 5 V rail and adding a dedicated 3.3 V regulator for the extra current — which would blow up the whole "tiny shield" idea. At 22 dBm the module runs straight off the Pi 3.3 V and stays cool. The E22-900 covers 850–930 MHz, so it works in EU868, US915 and the other 900 MHz regions. Meshtastic does not auto-cap the output to the EU legal limit — you must set the TX power yourself (see documentation)

Small, focused, and it just works. 🎯

What you get A fully assembled Mesh-PI board with 2x7 pins connector.

⚠️ You need to buy a antenna, can be u-FL antenna, u-FL to SMA connector, or you can solder SMA dedicated connector direclty on PCB. No Antenna, nor Raspberry Pi, nor Enclosure are provided, pictures are for reference and illustration

"Lettre Verte", "Lettre Suivie", "Service Plus" shipments are not insured. The postal service sometimes loses mail—this is very rare, but it does happen. No claims can be made if this occurs. I cannot be held responsible for postal service errors. If you do not wish to take any risk, please choose registered mail.

Some letters may take up to 3 weeks to arrive. This is also rare but has happened before, so there is no need to worry if delivery occasionally takes longer.

Les envois en "lettre verte" ou "suivies" ne sont pas assurés. La poste perd parfois les courriers, c'est très rare mais ça arrive. Aucune réclamation ne pourra être faite si cela se produit. Je ne saurais être responsable des erreurs de la poste. Si vous ne souhaitez pas prendre le moindre risque, choisissez un envoi en recommandé.

Certaines "Lettres Vertes" peuvent mettre jusqu'à 3 semaines à arriver, c'est rare aussi mais du déjà vu, donc pas d'inquiétude si la réception est parfois longue.