mihailazar.hashnode.devESP8266 + SIM800L: Simple Guide to Sending SMS with Arduino IDEAdding GSM Connectivity to ESP8266 Projects with SIM800L Introduction Cellular communication is a powerful addition to any IoT project. With a SIM800L GSM module connected to an ESP8266 NodeMCU, you can send and receive SMS messages, monitor devices ...Sep 23, 2025·4 min read
mihailazar.hashnode.devWater Level & Volume Monitoring with ESP8266When I started storing water in a 2000l horizontal cylindrical tank, I quickly realized I had no easy way to check how much water was inside.Commercial level sensors were either too expensive or overkill, and I also wanted the data integrated with my...Sep 22, 2025·4 min read