The project approaches this goal by developing and deploying a sensor network, which nodes are designed as extension boards for the LoPy board. Each node is autonomous (the extension board powers the LoPy from a battery and includes a charger for the battery that takes energy from a power solar panel) and has several sensors (temperature, humidity, solar radiation and GPS) whose values are read periodically and are sent via Lora. The samples are sent to a LoRa gateway that is responsible for communicating using MQTT protocol (Lightweight protocol commonly used in IoT, Internet of things, based on publish / subscribe), to an external server with MQTT broker previously configured to receive the publications and that allows that clients can subscribe to them. The server includes a MQTT client (ThingsBoard, IoT open-source platform that allows a rapid development, management and scaling of IoT projects) that is subscribed to these publications and allows the graphical representation of the received data providing a human friendly visual representation of the data.
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Solar Node Folder It contains the different services that make up the software architecture of the solar node and their respective configuration files.
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Gateway Folder Contains the code in json format implemented in the Node-RED tool used in the gateway to control the different messages received by the nodes.
$ git clone https://github.com/Minifrash/Development-of-solar-irradiation-sensor-network.gitIt is necessary to use the "Froze Code" technique which consists of including your own modules in a MicroPhyton firmware version, thus allowing the use of RAM for dynamic loading. The process of installing the necessary tools in the Frozen Code process consists of creating a new directory (pycom or other) in the $HOME directory and executing the following commands:
$ sudo apt-get install gcc git wget make libncurses-dev flex bison gperf python python-pip python-setuptools python-serial python-cryptography python-future python-pyparsing (packages needed for the process)
$ mkdir pycom
$ cd pycom
$ git clone https://github.com/pycom/pycom-micropython-sigfox.git
$ git clone https://github.com/pycom/pycom-esp-idf.git
$ cd pycom-esp-idf
$ git submodule update –init
$ cd ..
$ wget https://dl.espressif.com/dl/xtensa-esp32-elf-linux64-1.22.0-80-g6c4433a-5.2.0.tar.gz
$ tar zxf xtensa-esp32-elf-linux64-1.22.0-80-g6c4433a-5.2.0.tar.gz
$ export PATH=$PATH:$HOME/pycom/xtensa-esp32-elf/bin
$ export IDF_PATH=~/pycom/pycom-esp-idf
$ cd pycom-micropython-sigfox
$ cd mpy-cross && make clean && make && cd ..To include the code in the firmware of MycroPhyton you have to copy the code of the application in the $HOME/pycom/pycom-micropython-sigfox/esp32/frozen/Common, and then copy the main.py and the boot.py of the application in the $HOME/pycom/pycom-micropython-sigfox/esp32/frozen/Base/. Finally, we put the device in "bootloader" mode, open a terminal in the $HOME/pycom/pycom-micropython-sigfox/esp32 directory and execute the following commands:
$ make BOARD=LOPY clean
$ make BOARD=LOPY TARGET=boot
$ make BOARD=LOPY TARGET=app
$ make BOARD=LOPY ESPPORT=<Path of the device> flashChanges and improvements are more than welcome! Feel free to fork and open a pull request. Please if you can, please make sure the code fully works before sending the pull request, as that will help speed up the process.
This code is licensed under the GPL-3.0.