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15$ LoRa Gateway/Node ESP8266 OLED PCB build

ESP8266 based LoRa Gateway/Node using a 433MHz Ra-02 module along with an OLED display. All this circuitry is combined to make a custom PCB.

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Hey, what's up, guys? Akarsh here from CETech.Today we are going to make a project which is a simple LoRa node and you can even use it as a single channel gateway.Here the microcontroller that I have used is the ESP8266, which is connected to LoRa boards of 433MHz(Ra-02 by Ai-Thinker), I have also attached an OLED display to the PCB so that the packet information is visible.To make things simpler I have designed a PCB which you can get manufactured for soldering.I have also made a video about building this project in detail, I recommend watching that for better insight and detail.https://www.youtube.com/watch?v=bE-HW8yzJeM

BOM.xlsx

Bill Of Materials

sheet - 7.22 kB - 03/21/2019 at 16:16

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x-zip-compressed - 300.77 kB - 03/21/2019 at 16:16

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  • 1
    Parts

    I got the majority of the parts for my build from LCSC.

    You will need:

    1) Ra-02 LoRa module

    2) ESP8266

    3) OLED display

    4) Passive components like resistors and capacitors

    You would require the PCB to solder these components which we will take a look at the next step.

  • 2
    Get the project PCB manufactured

    You must check out JLCPCB for ordering PCBs online for cheap!

    You get 10 good quality PCBs manufactured and shipped to your doorstep for 2$ and some shipping. You will also get a discount on shipping on your first order. To design your own PCB head over to easyEDA, once that is done upload your Gerber files onto JLCPCB to get them manufactured with good quality and quick turnaround time.

  • 3
    Connections (THEORY)

    Mainly there are 4 aspects in connections here:

    1) ESP8266 just to function correctly needs some pull up and pull down the connection for G0, G15, EN and RST.

    2) Ra-02 and the ESP8266 modules are connected to each other using the SPI protocol

    3) OLED and the ESP8266 connect to each other using the I2C bus

    4) All the modules need to be connected to power rails for them to operate.(Obvious :P)

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