A Gateway using Xbee

In this repository, I create a communication between two microcontrollers using XBee protocol, then sending frames to phone through Bluetooth Low Energy (BLE). In near future, database will be added soon.

Components:

• NODEMCU ESP32 (I used the Arduino IDE to program esp32, so you may need this link How to Program ESP32 with Arduino IDE? )
• module XBee S2C (with module board base shield for easily serial connecting)
• DHT22 Sensor Module
• A phone has been installed nRF Connect

Configuration

Install XCTU. Use XCTU for installing the firmware to the XBee® devices. XBee® ZigBee network must have only one Coordinator. All other devices in the network must be XBee® ZigBee End Device or XBee® ZigBee Router. Here, the second xbee is configured as a router.

XBee® ZigBee Coordinator:

• Coordinator must have the firmware with ZigBee Coordinator API functional set.
• Use XCTU to set PAN ID, Coordinator Enable.
• Use XCTU to set BD (Baud Rate) to 9600.

XBee® ZigBee Router:

• Devices must have the firmware with ZigBee Router functional set.
• Use XCTU to set PAN ID. It must be equal with Coordinator.
• Use XCTU to set DH and DL to 0x0 (send data to Coordinator).

Next, we will connect each Esp32 to each Xbee by using serial protocol (Rx->Tx, Tx->Rx). The one with xbee coordinator is called receiver, the other one is called transmitter.

Then we connect DHT22 sensor to Esp32 (transmitter) like this:

Usage

• Install all necessary libraries
• Upload code to Esp32 board
• Turn on your Bluetooth, connect to BLE server in receiver, and get result.