Radio HAT

HAT LoRa Mesh

Name: ModBee HAT LoRa Mesh
Brand: ModBee

Long-range mesh radio between nodes

Links Node UIOs across a farm, a plant or a water scheme without cabling or a cellular plan. Each HAT carries an Ebyte E52 LoRa mesh module: serial data sent at one node arrives at another, with no coordinator or gateway to set up.

Available now. Online shop coming soon.

Ask for pricing Schematic (PDF)

Overview

What it does

By default the HAT sits on the Node UIO's RS485 CH0, so BeeBus or Modbus runs over the radio as it would over a cable. A solder bridge moves it to CH1, or wires it straight to the UART.

The mesh runs in the Ebyte module's own firmware, in transparent mode. Channel and transmit power are set with AT commands.

The module ships set to 868.125 MHz. Set the channel to the 915-928 MHz band before use in New Zealand or Australia.

Features

LoRa mesh with no coordinator
915-928 MHz for New Zealand and Australia, up to +22 dBm
Bridged to RS485 CH0 (default) or CH1, or wired direct to the UART
Can share a stack with a cellular HAT, so one node can be the site's gateway
On-board RS485 transceiver with selectable 120 Ω termination

Views

Renders

Node UIO with a HAT LoRa Mesh, side view

Specifications

Technical details

Figures from the schematic, the module datasheets and the documentation on GitHub.

Documentation

HAT LoRa Mesh specifications
Module	Ebyte E52-900NW22S (pin-compatible E52-400NW22S for 410-509 MHz)
Frequency	850.125-929.125 MHz, 80 channels. Use 915-928 MHz in NZ and AU
Transmit power	-9 to +22 dBm
Air data rate	7, 21.875 or 62.5 kbps
Sensitivity	-121, -116 or -111 dBm (by air rate)
Range	1.6-2.5 km line of sight (manufacturer's test)
Host interface	RS485 to the Node UIO (CH0 default, CH1 by solder bridge), or direct UART
Antenna	IPEX connector on the module
Module operating temperature	-40 to +85 °C (module rating)
Board size	55 x 74 mm, stacks on the Node UIO