When trying to get the DS18B20 one-wire temp sensor working with the NodeMCU Lua firmware make sure you have compiled the firmware with said one-wire module..
Pop along to https://nodemcu-build.com/ and make sure the 1-wire box has a tick..
I’ve quite a number of nodemcu’s – around 12 of them.
Some of them are the smaller Amica based boards while a large number are based on a larger PCB and are usually just black on the reverse. The PCB’s are also have squarer corners while the better Aimca versions are nicely rounded.
These larger PCB based nodes use cheaper UART chips and I’ve had a lot of them fail. The usual symptom is for the nodemcu to work as normal (if it’s ￼already got code flashed to it) but if you plug it into the computer’s USB socket it’s not seen or it just hangs when trying to communicate with it.
Continue reading Cheap nodemcu not seen by the computer
Going back to the my previous blog post about creating the senses and brains first in my IOT house I decided to do a bit of planning..
I spent a bit of time working through the house, room by room, thinking what could be easily monitored and controlled.
I then put this down in a matrix of sensors that correspond to our five senses, this will make it easier to understand the number of ‘thing’s i needed to get hold of and what is going where and why.
Continue reading Deciding on what sensors to create