This post will cover the use of the ESP8266 clone form factor of the more popular Wemos D1 Mini. This clone development module has the same pinout and interfaces as the Wemos D1 Mini. The Arduino IDE was set to use the NodeMCU 1.0 ESP12E Module for the code below, although the LOLIN(WEMOS) D1 mini (clone) was avaliable. This board selection didn’t present any issues when loading the firmware. The board is inexpensive, a 10 pack can run around $25….
This post will cover the use of Node Red as a system monitoring tool. Why is this useful? It gives system status at a glance. With some advanced configuration, Node Red can provide trend analytics or automated responses. Here is a comparison of two methods to gather metrics from systems and present them in Node Red. The first method is with the SNMP node. This is centralized because Node Red is the single point that is gathering metrics from multiple…
This post will cover recent uses of the NRF24L01 with the EPS32-Cam module. An earlier example used an the NRF24L01 module attached to an Arduino Uno, a laptop, and a logged putty session, details can be found here, https://www.cloudacm.com/?p=3836. This configuration had limitations due to its size, the required pieces of equipment, and operating steps. The purpose of this scanner type is to survey 2.4Ghz radio transmissions. The NRF module can detect power levels across the band and store those…