An application that integrates the ESP32, the SIM800L, the temperature-humidity sensor AM2301, and the dev board A9G. This code use the ESP32 has the main microcontroler of the group, and it is in charge of asking the temperature to the sensor and process it, giving the AT Commands to the A9G to start the GPS and to start the to deliver the data, and also to give turn on the SIM800L and then give it the AT Commands for it to forward the data acquired from the GPS and the sensor to a mobile cellphone (by 2G) and to thingspeak (by GPRS with through HTTP GET). It also check the state a pin connected to the door sending information if it is open at anytime.
The AT Commands have their parsing. The GPS raw data is also parse before sending it.
- Download the latest realase with
git clone https://github.com/antusystem/Tracking_main.git - Go to the folder cd ../Tracking_main
- Build the menuconfig to make the respective changes to your computer
- If you are using Eclipse, once it is added as a project, in its propierties check C/C++ Build > Environment check the IDF_PATH if it is correct
- Compile
make clean - Compile
make all
It should not indicate any error following this steps. Continue reading to learn the location of the GPIO that connect the hardware.
For this it was used the TTGO T-Call SIM800L that includes an ESP32 and a SIM800L in the same dev board, the temperature-humidity sensor AM2301, and the dev board A9G from Ai Thinker that has GPS and GPRS (though the GPRS was not used with the A9G).
Remember that SIM800L only suports 2G and GPRS and it might not work in some countries.
SIM800l_PWR_KEY: SIM800l Power Key pin SIM800l_PWR: SIM800L Power pin SIM800l_RST: SIM800L Reset pin
| ESP32 | SIM800L |
|---|---|
| GPIO27 | TX |
| GPIO26 | RX |
| GPIO04 | SIM800l_PWR_KEY |
| GPIO23 | SIM800l_PWR |
| GPIO05 | SIM800l_RST |
| ESP32 | AM2301 |
|---|---|
| GPIO19 | Data line |
| 3,3 V | VCC |
| GND | GND |
| ESP32 | A9G |
|---|---|
| GPIO18 | TX |
| GPIO15 | RX |
| GND | GND |
Note: GPIO18 of the ESP32 must be connected to the reception from the A9G because it was configured as TX. The same way happens to GPIO 15, it is configured has recepction so it has to be connected to the transmission of the A9G. In the SIM800L happens the same, but the pins are connected directly in the board.
To configure the pins you have to change them manually in:
- For the SIM800L communication go to uart.c
- For the SIM800L power up go to GSM.c
- For the A9G communication go to uart.c
- For the AM2301 data line pin go to AM2301.h
- For the phone number that will recieve the message go to GSM.c in the define Phone_Number
- For the API key of thingspeak go to GSM.c in the define API_KEY
Check de IDFPATH in the configurations of the proyect
- Last compile: December 18th, 2020.
- Last test: October 31, 2020
- Last compile espidf version: v4.3-dev-472-gcf056a7d0
MIT License
Copyright (c) [2020] [Alejandro Antunes]
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.