Hi I am looking for a UV Sensor that shows current intensity and accumulated light over time. Does anyone have any suggestions? I was looking at: Grove - UV Sensor, ML8511 and VEML6070.
@skywatch do Fluke meters work unattended in enclosed cabinets or walls, using varistors for power supply 24/7?
As I've said I prefer using a better power supplies with built-in over-voltage protection. As for how it is achieved without a varistor you can find plenty information by yourself using google.
@NeverDie i can speak for arduino side im not sure how it works for CircuitPython. virtual hard drive part is only true if there was a bootloader prior to update. im not sure how nordic ships their dongles but i think they dont install adafruit bootloader inside of them so you need a fresh bootloader install and it is easy but you need jlink for that. after connecting your jlink to nrf52 open the arduino from menu find jlink for adafruit nrf52 and then just simply click install bootloader and voila it works with arduino.
but then again that usb dongle wont work seamlessly with adafruit bootloader because im sure adafruit has different pin maps you just need to check their pins from variants file and match them on paper to the dongle so when you write your code you know which ones to use, unless theres a seperate variants file specifically made for this dongle.
If anyone else ends up here like I did.
To drive the DIM Control pin without pulling from Vdd, try this.
This will keep the micro isolated. This assumes that you use a dual optoisolator, and that the CTR is the same. To ensure they ARE equally matched, you can buy the more expensive IL300 or LOC110 - built especially for this purpose.
Also do note: if you are going to make a DUAL dimmer, then do NOT connect the 'GND' between dimmer A and dimmer B. They must be separate.
@wassfila Your project looks very cool and I considered it earlier. Thanks for sharing
I excluded it because I was concerned that you might stop developing it and that would kill the project.
I want to focus on developing sensor-nodes and using the data in openHAB.
I really think some kind of self-healing mesh solution is the way to go, especially since I want to be able to expand freely and just drop in more nodes at will without disturbing the others.
My current plan was to use MQTT-SN over openthread and then use the homie standard to get everything auto-discovered in openHAB.
But now when you say openthread is somewhat experimental I'm no longer sure.
To me openthread seemed quite well documented and I like that Nordic provide so many examples.
In your experience, is thread unstable?
I want to go for the DIY approach mainly because.
I want to be able to choose my own sensors and know that I get quality pcbs that last.
Commercial multi-sensor nodes are generally fairly expensive. Making one custom doesn't pay off, but 30+ does.
My end-goal is to make energy harvesting nodes, both indoor and outdoor, that once installed will be able to do their job until their components break.
The more I type in this response, while looking at your github and hackaday I feel like maybe I should give nrf52 Mesh a try.
Do you have any OTA working for your setup? I'm not looking for a fancy gui, just a python script on the border router or similar.
