![]() We will design a system to monitor DHT22 temperature & Humidity, battery voltage along with charging and discharging status. You can also get some batteries with a cut-off voltage of 2.5V.Ĭircuit Diagram: ESP8266 Battery Level Monitoring The battery I am using has a discharge cut-off voltage of 2.8V. It varies depending upon the battery type and applications. If you see the manufacturer’s datasheet then it is clearly mentioned that the cut-off voltage is 3V. When the battery charges to full the maximum voltage is 4.2V. Most of the Lithium-Ion batteries have a nominal voltage of 3.7V. This type of Lithium-Ion battery has a Battery Management System Circuit for over-voltage protection, balanced charging, short-circuit protection, etc. But now with the help of the Blynk IoT, we can directly notify the users remotely when the battery percentage is below a threshold value. In our earlier battery status monitoring system we can only monitor battery voltage and percentage. So, to overcome this problem I thought of adding a battery monitoring system to the same project. But sometimes I forget to charge and the whole system is down. We need to charge the battery again using the TP4056 charging module. ![]() This battery can power nodemcu boards for around 10 hours. The whole system is powered by a single 3.7V lithium-ion battery. Here for the demonstration, we will build an IoT weather station using DHT22 Temperature & Humidity sensor, ESP8266 development board, and Blynk IoT Cloud for remote monitoring. Video Tutorial & Guide: ESP8266 Monitor its Own Battery Level using IoT for battery powered projects Overview: Monitor Battery Level using ESP8266 & Blynk IoT.ESP8266 Monitor its Own Battery Level using Blynk IoT.Reconfiguring wi-fi credentials on device without hardcoding.Source Code/Program: ESP8266 Monitor its Own Battery Level using IoT.Creating Events on Blynk for Notification Alerts. ![]()
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