Visonic MCT-201 Miniature Pendant PowerCode Wireless Transmitter (868 MHz ISM band, PWM)
Arduino Uno & Dragino Lora Module (Semtech SX1278) http://www.dragino.com/products/module/item/102-lora-shield.html
Open-Electronics sx1278 library is available in GitHub. https://github.com/open-electronics/LoRa/releases

Serial.println(b);
Serial.println(b);
vis-cont-d1.jpg

Serial.println(b);
vis-cont-d2.jpg

Arduino code: https://teknokoodiradio.vuodatus.net/lue/2017/10/friedland-libra-wireless-doorbell-analysis-with-sx1278