The Smart Trolley System manages trolley items using RFID technology, displays real-time updates on an LCD, and sends SMS notifications with product details and total amounts via a GSM module.

Simple GSM shield Manager for Blynk and ESP32 / ESP8266 boards, with or without SSL, configuration data saved in SPIFFS / EEPROM. This library enables user to include both Blynk GSM/GPRS and WiFi ...