To provide a large enough pulse to drive the ceramic transducer , you need a lot of energy, so they pump up the 5v with an inductor/transformer to provide a high voltage pulse. This is 60v or more…
The more Energy you produce the farther the pulse will travel….
Everything thing else on the board run at 3.3 to 5V.
Add a large Capacitor of 100 µF are so between the 5v and ground on the device, this may clean up your problem.. Some CPU modules just can’t supply enough current quick enough that’s needed when the pulse is triggered.
These are very inexpensive device, we’re luck to see them work at 1/2 the spec range.
@magpern said in MyQTherm - replace IQTherm heating thermostat:
I actually am thinking somewhat in the line of discontinuing mysensors network. It is to much, hacks and tricks, and I forget everything in between sessions.
I gave up more than once, also over period of years. Recently I came back again and decided to focus on the heart of the issue, getting my radios working and once you get over that, it starts to get fun again.
I can respect if you already moved on to something else. I even cheated on MySensors and installed some 433 mhz devices too , just to get something working. You have to keep your interest in HA alive in the meantime. But the reward is great when you get MySensors working.
There are "easier" solutions like Tasmota, 433mhz, etc. but not as customizable as MySensors. MySensors is for when you outgrow those other solutions and need something more custom.
@yveaux said in Ikea Molgan Hack:
@magpern the instructions on openhardware.io state that the Molgan must be battery powered while programming:
Well, then I can confirm that you don't have to power the Molgan from batteries just for programming. Burning the bootloader works fine with just power from the ISP port and programming it through FTDI works fine if power comes from the FTDI.
What I found wierd is that the atmega328 had power, the radio had power, it wrote debug messages to the FTDI - when powered through the FTDI, it send radio messages etc, but it just did not receive messages.
Messages where not received until I supplied power to the + / - pads (battery pads).
I did read the instructions on openhardware.io, but I didn't follow then to the t.
