Hardware

@awi @Sparkman Thanks guys, will implement these and see how it goes

Okay, it appears to be working now as advertised with only power from the USB connector, but I believe that the board has an intermittent connection on it. I can't see any solder joints that look suspect, so most likely it's one of the esp8266 pins.I will just have to handle it delicately. Thanks for the help.

@scalz: good tip! I prefer to triple check before committing to a pcbmaker.

@johnr Cool! I will try and get back here with my findings :) Tnx!

hi Andreas, if you change your dimension in EAGLE then OSHPark and others will cut the PCB in that form. But you can also just define a "keep out" area with a polygon. The capacitor seems OK to me. All 100nF I have are 2.54mm pitch. My 10uF capacitor is 5mm diameter (8mm high), the 100uF is 7mm diameter (12mm high). I am not familiar with 3mm duo-leds. I live in Wilrijk, south of Antwerpen (Belgium), but I spent some time on other continents and even three months in Munchen as a student working in the research facilities of Siemens in Neu Perlach. I'm assuming you live in Germany. Gert

@Zeph and @rvendrame thanx for claryfing things. I'll just have to build up a test circuit on a breadboard. I'll start with adding the 2.2 uf as specified in the datasheet and keep the radio wires short and will see from there. The specs of the LE33 are very promising, so I'm hoping to get this to work. At the moment I've setup a lot of sensors on breadboards. The 4.7 uf cap is 20cm away from the radio, but no problems so far.

@Steve-Caster read this and in fact the whole article.. ;-)

Hi Dwalt en Mikke, Thank you for your input/information. Based on your input I think that I can make a quick start!!! :-) Best regards, hans

I think what ericvdb said with the IR sensors is probably close to the best solution. If you figure out a way to count people at each doorway you could do a sudo presence detection. So, if you count people as they enter, and at each threshold remove a person from the room they are leaving and add to the one they are going to you should have something that is rather accurate. This could have issues if you carry someone from one room to another, but you could add pir to rooms to correct exceptions. Something along the lines of, you carry someone into the living room, it counts one person there, you go to kitchen, it reduces to 0 and turns off lights, but you have an exception that if there is motion and zero people it changes to one person in the room. Would just have to be sure your hvac does not set of the pir.

@punter9 Given it's a 5 volt module, powering it with 9V is not a good idea. The specs on the Songle relay indicate that it draws about 90mA. The official Nano has a 500mA 5V regulator so if you don't have too much else connected, that should be fine. If you are using a Nano clone, then take a look at the specs for the regulator it uses. Cheers Al

@BartE Thanks for that. My issue ended up being with the signal lead from the sensor to the arduino. A bad connector. Your advice on the pull-up resistor was very useful. Thanks

@Anticimex said: @Oitzu it should work just fine. Thanks. Ordered this. :+1:

thanks for the clarification. I'm not going to use the regulator at all, as I'm powering the whole setup with a HLK-PM01 (when it finally arrives).

@twosh any update on your project? I have exact the same setup, would love to see your code :-)

@MikeF Well not limiting, but reducing. Connect one or two ordinary diodes in series with the input, and you will reduce the voltage for 0.7V for every diode.

@Cliff-Karlsson Hi Cliff, I ordered one a few days ago and as far as I understand, the only other thing you need is an sd card to transfer the design from the editor/pc to the display. You can connect with an ftdi adapter, but it's much faster using the sd card. The cable to connect it to an arduino is included. Cheers Al

The library which @tomkxy posted works great for 8mhz processors. I have let it run for more than 24 hours without receiving a single timeout or checksum failure.