What is it?

System composed of 2 PCB boards : the Master and optionnel Slave boards.

The main board includes the following features :

• ESP32 Wrover Processor with BT / Wifi
• USB to Serial CHG340 interface (communication and programming)
• DS3231 RTC Clock + backup battery holder
• High Efficiency DC/DC power converter from 5-9V to 3.3V and 4.1V
• MicroSD Card holder
• GPRS SIM800L module support with level shifter + MIC/HP pin
• RF Transmitter and Receiver module printout (433/333 MHz)
• Jack DC power supply input

the optional Slave Board supports:

• 1.44' SPI LCD TFT screen (or)
• 1.3' I2C OLED screen
• 6 push-button keyboard
• Power Switch
• IO connectors

Why did you make it?

I did create a lot of individual systems to interconnect IOT and Domotic devices to math to all my needs like

• Domotic Web Serveur -> All IOT devices
• GPRS SMS -> RF controlled Gates and Door
• Alexa -> Connected Lights and Switches
• RF Transmitter -> RF Switches, gates, lights
• Rest API -> RF receivers
• ....

At the end, the global control and communication requires at least 4 bridges dedicated to specific protocol conversion.

I've decided to merge all of the into a one unique smart hub able to

-> Receive messages from

• Alexa : using Philips Hue and Wemos protocols
• RF message : PT2262 / EV1527 protocol
• Rest API switch and light control
• GPRS SMS orders

-> Convert and forward to

• Philips Hue, Wemos, Redmi Light
• RF switches : PT2262 / EV1527 protocol
• Rest API custom URL
• GPRS SMS messages

Other features are possible to develop using this board

• Audio communication connecting Mic and Speaker to the SIM800 Module
• Display SMS message on screen
• trigger alert by SMS, email or external event
• Include automation from connected sensor

Please pay attention that thoses features are possible to develop but ARE NOT provided in the example. A 100% complete product will be proposed later.

But, according to you need you can totally adapt the usage of the module according to your needs.

What makes it special?

It it provided in an small form factor including the most current communication interfaces. The module does not require additional system to be programmed or to run .. just a power supply. The included USB to Serial interface also controls the programming signals. The board is 100% compatible with Arduino IDE and libraries.

IMPORTANT NOTE

The PCB are provided WITHOUT any soldered devices. The order will be ONLY for le MASTER PCB (holding the ESP32). The additional SLAVE PCB (SCREEN and KEYB) are an option. the provided source code DOES ONLY TEST de devices connected to the ESP32. It does not include the SmartHub features as illustrated.
A pre-soldered ans tested version can be provided on request.