Hardware

@hek So the IRQ pin is connected to the Arduino D2? AH nvm i checked the schematic and found it, thanks! will try this!

I saw this one: http://www.ebay.com/itm/Digital-Light-Intensity-Sensor-Module-BH1750FVI-Stable-For-Arduino-TW-/131903322284?hash=item1eb60cf8ac:g:t1MAAOSwV0RXqVe9 This one looks better for outside use I think, because the sensor itself is more protected for water.

@mfalkvidd Thank you, I guess I will use the ESP then. Or perhaps I will try to write a script to use MQTT with the serial gateway... why add another network layer (WiFi) if you don't have to...

I have managed to solve this it looks like the CRC failure was down to an incompatible SPI Memory chip. I am now using Brand Adesto Technologies Mfr. Part No. AT25SF041-SSHD-B RS Stock No.223-0562 and it seems to work very well now. Especially if you take Martins recommendations below @martinhjelmare said in OTA firmware updating is too slow..: I implemented a check for firmware update message in my modified SenseBenderMicro sketch, and alternative behavior in the loop if FW update is ongoing. This doesn't solve the problem of dropped messages, but could be good to speed up the update and don't waste time on sensor updates. void loop() { if (fwUpdateOngoing) { fwUpdateOngoing = false; fwUpdateOngoing = wait(OTA_WAIT_PERIOD, C_STREAM, ST_FIRMWARE_RESPONSE); } else { normalFlow(); } } void normalFlow() { // Short delay to allow buttons to properly settle sleep(5); int buttonValue = digitalRead(BUTTON_PIN); measureCount ++; sendBattery ++; bool forceTransmit = false; transmission_occured = false; #ifndef MY_OTA_FIRMWARE_FEATURE if ((measureCount == 5) && highfreq) { clock_prescale_set(clock_div_8); // Switch to 1Mhz for the reminder of the sketch, save power. highfreq = false; } #endif if (measureCount > FORCE_TRANSMIT_INTERVAL) { // force a transmission forceTransmit = true; measureCount = 0; } sendTempHumidityMeasurements(forceTransmit); if (buttonValue != oldValue) { // Send in the new buttonValue send(msg.set(buttonValue==HIGH ? 0 : 1)); oldValue = buttonValue; transmission_occured = true; } #ifdef MY_OTA_FIRMWARE_FEATURE if (transmission_occured) { fwUpdateOngoing = wait(OTA_WAIT_PERIOD, C_STREAM, ST_FIRMWARE_RESPONSE); } #endif sleep(digitalPinToInterrupt(BUTTON_PIN), CHANGE, MEASURE_INTERVAL); }

@Efflon yes, that's correct.

I purchased from him before and recieved my boards. He also helped me get them set up.

It all depends if it is mission critical stuff, otherwise just keep a spare rpi and an arduino board pre-programmed that you can easily swap.

@alexsh1 veml6070 works nice. that's a while i've done this ulpnode board. finally i've done my coincell multisensors for indoor. And now, for lot of sensors etc i use more powerful mcu. That said i have a weather extension board with lot of sensors including the veml6070. will try to release when i'have time ;)

Wow, yes I am, thanks a lot!!

Oops. My bad. I thought I listed the sensor. I was looking at the BMP180 on the atmospheric pressure sensor build page. It looks like the BMP280 also has a +- 1 hPa absolute accuracy. Maybe I could take advantage of the better relative accuracy and sample pressure when the furnace is both running and not. The not running pressure would give me a good baseline.

The comparison has been done many times - just browse the forum or google it. Basically, if you are looking for stability and range, I'd recommend going for rfm69 nrf24l01+ is great too, much cheaper, but be prepared to face (a) fake transceivers and hence RF issues (2) power issues (3) range issues. Sometimes, one has to spent a lot of time to make them work sadly.

Hi :) does anyone know where i actually find the FT531IA? on aliexpress there are only FT531EA with output of 2.5V :(

@mfalkvidd plus a voltage regulator so i can plug the vcc directly into VIN for more current.

@Nca78 My colleague bought a box of 18 cr123a on Amazon branded keenstone for 26€

@sundberg84 I'll consider it thanks! The price is higher of course but still in the affordable range. You see, personally I find useless to collect data that is inaccurate even if it is cheap. I have been playing with the DHT11 because I found it in the arduino starter kit I bought last year, so for prototyping is ok, but for a real application I'd prefer more accuracy and reliability :)

For the moment, the lib doesn't support multiple transport (rfm69, rs485 etc.) at same time. Also, important side not, i don't think a Nano is enough powerful for doing this, flash nor ram..maybe i'm wrong ;)

I dont think the solution is what you wanted, if the arduino fails, you will not be able to turn the light on. It is good only to be able to override switches and turn lights off. I would like to come up with a full solution instead...