The new Hub 2.0


The hub was designed to gateway ESPNow messages over Wifi. It contains an ESP-12F module, ESP-01 module, 0.91 inch blue OLED, an active Piezo buzzer, an LED indicator for notification, an LED indicator for power, a switch to toogle between LED and buzzer notifications, an AMS1117 3.3V voltage regulator and a micro-USB connector for power (5 Volt).

Please note: the version you get will have the ESP-01 module detachable and sitting on 2×4 socket.

Out of stock

SKU: MDY00445 Category:

The purpose of the Hub is to take the ESPNow messages coming from my sensors and push them over Wifi to an MQTT server. Both ESP-01 and ESP-12F will come pre-loaded with the latest firmware.


On initial boot, wait 30 seconds, the hub broadcast will an SSID called ‘Setup Portal‘ with password ‘‘. After connecting to this SSID, go to and follow the instructions.

To program the ESP-12F

You will need a FT232R USB to serial programmer (3.3V only). The pins align with the PCB, simply plug them in on the left hand side and upload – as shown below. No need to put the ESP in programming mode, the FT232R takes care of that. Please note, you will not be able to flash the ESP-12F when the ESP-01 is connected to the PCB. Make sure it is unplugged before flashing.

Another option is to use Over-The-Air flashing which comes with the original firmware.

To program the ESP-01

Unplug it and use your usual way to program any ESP-01 module. I usually use this adapter.


Download the BIN file for the Gateway/ESP-12F ( 4MB FS:none OTA:~1019KB).

Download the BIN file for the Receiver/ESP01 (1MB FS: none OTA:~502KB).

If you have placed an order and require the source code, please email




hub 2.0 schematic

YouTube Video

Weight 0.03 g
Dimensions 7 × 3 × 1 cm


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