Tag: NodeMCU

NodeMCU has on analog channel which is configured to read the System voltage, we can configure it to sample the external pin. The ADC seems a bit jumping

ESP8266-01 version comes with a AT based firmware, you need a application processor/controller to solve a problem. if your use case doesn’t require lot of GPIO (ESP has

In this blog we will build Intruder detector using NodeMCU/ESP8266, more of like a burglar alarm. We will be using a IR reflection based sensor. The sensor working

In this blog we will see how to change PWM duty cycle of NodeMCU (PWM control) from a remote client. Our hard ware will be nodeMCU and on

In this blog we will see how to create a Azure IoT hub so that we post messages to Azure IoT hub. IoT hub has different SDKs  for

Lua allows to load a string and execute it as code at runtime. We can use this feature to send code snippets to the NodeMCU. There are several

Connecting NodeMCU to twitter: In this blog we will see how to post a tweet from nodeMCU (Connecting NodeMCU to twitter). Making nodeMCU talking to twitter server is

We have seen how to use MQTT on nodeMCU in previous post, But in that post we didn’t do any thing useful. In this post we will build a

In this blog we will see how to connect to a MQTT broker from nodeMCU and exchange messages. We will just subscribe to the channel and display the

One of the cool thing about node MCU is with little coding we can achieve complex functionalities. All the complexity is hidden in the library functions. In this