The repository contains the scripts that are used to program an ATOM-Lite from M5Stack.
- Uses MODBUS RTU over RS485 to read data from the sensors attached.
- The microcontroller used is an Atom-Lite from M5Stack.
- The sensors used were TSH300v2 and TST300v2.
- The data were collected sequentially from the sensors over a predetermined time interval.
- Once data were collected it was sent to AWS servers over MQTT.
- The number of sensors in the setup is 6
- More sensors can be added by updating the variable
const uint8_t num_sensors = ?. - For the above update, sensors should be of a similar type.
- More sensors can be added by updating the variable
- Fail-safe has been implemented for the cases of WiFi disconnect or AWS disconnect.
- Publishing topic
b1164/01/temperature_humidity- where
01is the Device ID. The IoT devices sending data to the AWS servers were categorized by the Device ID
- where
- Subscribing topic
b1164/01/parameters- Topic to control the IoT devices from the cloud
- Use vscode with PlatformIO
- Plug in an Atom-Lite through USB
- Upload the program using the vs code's platformIO interface
- Open Serial Monitor for verification
- Change the topics and AWS secret keys appropriately for your new IoT device.
- Change the device ID appropriately, if you are uploading to multiple devices.
- Change the WiFi credential appropriately.
- If using UWNet, then make sure that the device's Mac Address is added to the UWNet. Otherwise, you won't be able to connect to the internet.
- Verify the sensor's Slave address.
- Ensure that the
num_sensorsvariable is set to the correct number of sensors. - Different sensors will have different registers to read. This code is only for the sensor TSH300v2. If you are using other sensors, make sure to do the following
- Update register addresses
- Update the number of registers to read
- Update the data conversion requirements
For questions reach out to vselvaraj@wisc.edu