Hardware

The channel width of the nrf is "less than 1MHz" when using 250kbps according to the preliminary specification. At 2mbit the width is 2MHz. Increasing/decreasing the channel with 1 will move the center of the channel 1MHz. Maybe separating the two networks with more than 1 channel is required?

New comments should be in the thread over in the open hardware section here

@Yveaux I used panasonic PIRs, they are hard to find and price ranges widely. I submitted the build last summer.

In clean air, I calculated the value of R0 by using MiCS quick evaluation board. Formula applied :(ADC/(RESOLUTION - ADC)) * 51820---for NO2 and (ADC/(ADC-RESOLUTION))*100820 -- for CO and in polluted air I applied same formula and gave it a name Rs Then took ratio of Rs/R0 which is less than one. So I had a slope and its constant meand y = m*x + c But i do not know how to derive equation to find out the value of ppm from Rs/0

Got my HLK-PM01in the other day so I removed the buck converter from my test board and added one of these and now it communicates fine. Thanks for the advice.

@Ironbar I did some test with the nrf24l01 the one that come with the pa + lna amplifier (100mw) and get more than a 1km on LOS. you may also try the RFM69HW.. the one that has 20dbm output.

i am going to try to build a sensor to with this option.. Is it working? And what sensor[s] do you have?

@shabba said: Has anyone tried the moteino or anarduino using mysensors? I am very tempted to press the buy button on one or the other. Pity they are so pricey but I am getting lazy to solder etc so I like having it all on one PCB :-) I have! I'm using a Moteino as a gateway with a non -H and that worked out of the box. I'm now building some sensors (including the outdoors in the PIR-light one) with -H versions. I bought these Moteinos without the RFM to avoid customs costs. If you do buy them without RFM; do not forget to insulate the bottom side of the RFM with PV-tape. I didn't, and I couldn't get it to work properly. Insulated and away it went! In short: Moteino works! Small form-factor, wide voltage input with own LDO and low-power is easy. Succes with your projects!

Thanks for the fast help... I´ll try the NodeMCU

I have now ordered these http://www.aliexpress.com/item/Free-shippin-10pcs-lot-Low-dropout-regulator-LDO-MCP1702T-3302E-CB-silk-HGCO-SOT-23-original/32592966949.html?shortkey=FZFfYj2M&addresstype=600 http://www.aliexpress.com/item/Free-shipping-10pcs-lot-MCP1702T-1802E-1202E-1502E-2502E-5002E-2802E-3002E-CB-MB-new-original/32565249742.html?shortkey=jyaMrA3M&addresstype=600

@AWI Thanks. I know understand what you meant. I am also concerned with the safety of not blowing or overheating the device. THat's why I referenced a link to a devicee above because there are several components which I don't really know whether I need it with resiestive loads or not.

@AWI Right - I have about 50 104 (100nF) in my stock - they are very typical for atmega projects. Thanks once again for your help

@Terence-Faul not that I know of. And domoticz MQTT support is less than stellar. You cannot configure the topic(s) it listen to, and you need to go through node-red (a node.js app) to transform what the gateway sends. I honestly couldn't be bothered to install it, and went straight to mycontroller.org. I might try it out though, as I have a couple of lifx led bulbs that domoticz supports. Or (probably) I'll wait for openhab 2.0 to reach stable.

@hek Speech recognition is a fantastic idea, I've added it to my list of may be projects!

@Matt-Pitts said: I'm wondering if it's possible to set them up to communicate directly with my mqtt broker over wifi rather than adding the radio and going via a gateway?? Yes, this MQTT gateway supports this: https://github.com/mysensors/Arduino/tree/development/libraries/MySensors/examples/GatewayESP8266MQTTClient Just remove the #define MY_RADIO_NRF24

With regard to 5V periphery I ordered [1] http://www.aliexpress.com/snapshot/7243167912.html [2] http://www.aliexpress.com/snapshot/7248371073.html Both have quite high cut off voltage i.e. they will not boost if voltage drops below certain value, I believe i's like 2.4V :-( #2 refused to work with my servo motor at all, so I don't recommend it. #1 is sort of OK but you need 3 AA cells to make a good use of it unfortunately.

@moskovskiy82 NO there should be no problem when swapping L and N.