# A custom LoRa end node & Monitor System **URL:** \ **Category:** Use Cases\ **Created:** [April 20, 2022, 6:56pm UTC](https://www.thethingsnetwork.org/forum/t/a-custom-lora-end-node-monitor-system/56597 "2022-04-20T18:56:16Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![pnwas\_jswttn](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/pnwas_jswttn/32/35697_2.png) [@pnwas\_jswttn](https://www.thethingsnetwork.org/forum/u/pnwas_jswttn)\ **Post date:** [April 20, 2022, 6:56pm UTC](https://www.thethingsnetwork.org/forum/t/a-custom-lora-end-node-monitor-system/56597/1 "2022-04-20T18:56:16Z")
I have been designing a series of boards for a remote LoRa end node, a monitoring system, and integrating the end node to the TTN. The system is designed to be as flexible as possible and connect to a variety of sensors/sensor modules. The LoRa node uses the Arduino LMIC library and other libraries for sensors. Software development is done with the Arduino IDE and stm32duino/Arduino\_Core\_STM32. A RPi4 with a RAK2245 module is the gateway to the The Things Network. - LoRa End Node STM32L15X CPU with RFM95 LoRa Module (915Mhz). ![MainBoard_500x418](https://www.thethingsnetwork.org/forum/uploads/default/original/3X/0/8/089417ad616cb1b9041f445160fe55fd74d7cbe5.jpeg) - Sensor I/O Interface 3 - 12 posistion screw terminals to I2C, UART, ADC/DAC, GPIO. 24LC32 EEPROM for configuration information, EUI, etc. ![SenTermIOBrd_500x413](https://www.thethingsnetwork.org/forum/uploads/default/original/3X/b/0/b0391319fe010cc642fc0fcc4c923a469d7da4c5.jpeg) - MPPT Solar Charger 12V Solar panel to 2S LiPO battery. ![SolarCharger_500x236](https://www.thethingsnetwork.org/forum/uploads/default/original/3X/7/d/7df05e838058f3c429a4d8c0df70d134ba4c12f8.jpeg) - Enclosure and Monitor ![Monitor_SolarPanel_500x667](https://www.thethingsnetwork.org/forum/uploads/default/original/3X/3/b/3bb455d9e0c7e3c9bb0832ecf44e93568a3f411e.jpeg) Integration of TTN and Ubidots ![ubidots_22_03_16_scale](https://www.thethingsnetwork.org/forum/uploads/default/original/3X/f/4/f4a6735953320d5db235d28c63000e2af4cd726f.png)