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Controllers and HATs for DIN rail

Start with the Node UIO and add only what the site needs: a cellular or LoRa mesh HAT for communications, a mains supply HAT, or the MPPT Charger and Battery Pack where there is no power. Every product is available now, with a published schematic.
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Node UIO with a HAT LoRa Mesh stacked on top
Controller

Start with the Node UIO

ModBee Node UIO controller in its DIN-rail enclosure
Controller

Node UIO

Industrial I/O controller for DIN rail
ESP32-S3 controller with 8 digital inputs, 8 digital outputs, 4 analog inputs, 2 analog outputs and two RS485 ports. The base every HAT stacks on.
Node UIO details
HATs

Stack what the site needs

HATs plug onto two 8-pin headers on the Node UIO. Fit one cellular HAT per stack; the LoRa Mesh HAT can share a stack with it.
ModBee HAT CAT SIM7070G cellular board
Cellular HAT

HAT CAT SIM7070G

LTE Cat-M1 and NB-IoT with 2G fallback and GPS, GLONASS and BeiDou, for sites that report small amounts of data on little power.
Details
ModBee HAT LTE A7670G cellular board
Cellular HAT

HAT LTE A7670G

LTE Cat-1 at up to 10 Mbps down with 2G fallback, for sites that send more than LTE-M can carry.
Details
ModBee HAT LoRa Mesh radio board
Radio HAT

HAT LoRa Mesh

Ebyte E52 LoRa mesh on 915-928 MHz, bridged to RS485, linking nodes across a site with no cabling or coordinator.
Details
ModBee HAT PS AC/DC mains power supply board
Power HAT

HAT PS AC/DC

Powers a Node UIO stack straight from the mains, with two 24 V outputs for field devices.
Details
Solar power

Power for remote sites

The MPPT Charger and Battery Pack are separate DIN-rail modules that run a Node UIO from a solar panel.
ModBee MPPT Charger in its DIN-rail enclosure
Solar power

MPPT Charger

TI BQ25798 solar charger with an ESP32-C3, set up from a browser. 12 V panel, 2S-4S lithium, 3 A load output.
Details
ModBee Battery Pack 18650 in its DIN-rail enclosure
Solar power

Battery Pack 18650

Three 18650 Li-ion cells with a TI BQ77915 protector: over- and under-voltage, over-current, short-circuit and temperature protection.
Details
How it fits together

One stack per site

  • HATs stack on the Node UIO through two 8-pin headers carrying power, I2C, a UART and both RS485 pairs. They are not Raspberry Pi HATs.
  • One cellular HAT per stack: CAT for LTE-M and NB-IoT, LTE for Cat-1.
  • The LoRa Mesh HAT sits on RS485 and shares the stack with a cellular HAT, so one node can be the gateway for the rest.
  • The PS AC/DC HAT runs the whole stack from 85-500 VAC.
  • On solar: panel to the MPPT Charger, MPPT to the Battery Pack, and the MPPT's load output to the Node UIO.

Need it built for your site?

We design custom hardware, white-label controllers, HMI panels and OpenPLC programs. Tell us what the site has to do.
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