Mod

@monte said in What did you build today (Pictures) ?:

@scalz but why do you need this on an already working node? Mysensors has backward compatibility so far. Do you expect any improvements from updated sensor libraries for a working node? In this case, you of course would need proper FOTA.

I don't think that a major fw release (MySensors in this case) always guarantees full backward compatibility.
Perhaps not for a sensor lib (but who knows), still, if not for any core updates, do you expect any improvements from updated MySensors lib for a working node/network? If no, then you don't need fota
app settings != app/fw update

@monte said in What did you build today (Pictures) ?:

@NeverDie I mean, what exactly use scenario for FOTA update of a remote working node? What can you possibly want to change remotely without changing any hardware?

for example arduino core used for the firmware (sdk..), libraries updates (MySensors, sensors), etc

@stevefury sorry, I don't understand. Which modifications are you referring to?

NodeManager was created by @user2684

@monte with the large flash space on the nrf5, what you are suggesting should be quite feasible. I have no experience with NodeManager, but from what I've understand it is a nice abstraction. Maybe NodeManager can be used to also switch between different features in a formware? Or maybe it is possible to draw inspiration from the NodeManager to create something new, without having to start from scratch.

@NeverDie said in What did you build today (Pictures) ?:

@Nca78 Looked at another way, once installed and sealed up it will also be a sort of time capsule.

I said hidden and not sealed. Unless you have worked really hard on the FOTA for nrf52 ?

@alowhum said in Looking for very simple rocker switch:

Thanks! How can you tell if their pins are thick enough to fit into a Duport connector snugly?

I finally made and receive the order, I ordered this one and it's huge. So huge that the pins are in fact way too big (0.8*1.2mm section) to fit on a breadboard or in a Dupont connector

Hello @rozpruwacz, no there is no better solution...
All the precision lies with the regularity of the air flow and you need to make sure the fan speed is stabilized. But probably you can measure before that, make some tests.
Also, 80mA is the peak consumption when it lights up the led, but in real life I have less than that as peak (a bit over 60mA), and only for a short time, while most of the time it's way lower. So you can at least cut you average in half, and probably fan speed will be stable (or at least, stable enough for a decent precision) before the 30s seconds so you can save more.
But to use that sensor on battery you have no choice but to use a good 18650 or 26650 if you want it to survive for at least a month at 1 measurement/mn.

A relatively basic board, based on a cheap CDEByte module, some leftover iTead power supplies (with not so-well aligned footprint) and a PCA9555 to drive the SSRs directly. I have suspended ceiling with many light spots so I want to be able to control them either one by one (in small rooms with less than 8 spots) or by groups/area in bigger rooms. This will be hidden in the ceiling in an electric box so I have no size constraint and it was easy to respect the creepage/clearance distance and include slots.

Resistors are the pullups for the I2C bus that I stupidely forgot (and yes I fixed that ugly solder point for the middle SSR)

Result in Things Gateway:

Great work shoehorning MySensors and BME280 lib in 8 K !

But CR2032 is a bit over 200mAh so the battery life will be closer to 6 months. I don't advise to skip the capacitor, and I would even put a 100uF one. CR2032 has a high internal resistance and when you draw 20+mA for sending a message the capacitor will help supply enough power and help the battery so its voltage will not fall too low.