One little project and you're hooked! You know you're going to want another sensor in the yard, so consider a gateway running MQTT (called a broker). Once you have that, it's really easy to add more sensors.
But if you're really strong willed an will only be using two devices ever, you might look at https://nrf24.github.io/RF24/index.html. You can get an Arduino Nano and an nRF24 radio for about $3.50 from Aliexpress (downside: delivery takes ~2 months, so get 10 each.)
MySensors Library can do this, too, but I find it a little bloated.
Personal note: I'm 70, retired engineer, and have only four projects going right now.
@BearWithBeard Wow, thanks for this detailed answer!
Today, I received an answer from Ebyte:
Yes, because of the shortage of chips, E01-ML01D is temporarily out of stock. It will be available in next mouth, if you have a purchase plan, please book as soon as possible.
@skywatch So, there is hope
@NeverDie
Received sound relay switch and connected to my alarm aux power in parallel with pir to supply power, added 100mA fuse on positive dc cable to prevent module making any problems with alarm panel but not sure if i was supposed to do it on negative dc wire.
Connected Normally Closed circuit to relay Com and NC contacts and adjusted sensitivity of microphone and time. Microphone is sensitive to claps but in my case it has to be a loud hand clap to trigger it. It has status led that shows when relay is activated so I can see if it is working on my monthly sensor checks.
Looking at my original intentions I am not 100% there as I am relying on single smoke sensor and its speaker. I think I will wait a few years and maybe something will come up that has relay (not relying on internet) but in the meantime I am happy to have something working and have some peace when I am away knowing that something is monitoring it (ordered same relay module for backup).
Have a good weekend
HI All.
Still having problems and this is my first purchase from PCBway not sure if the code need to be changed for this board but I am using PCB MySensors Gateway Ethernet 3.0 developed by fifisoft57. The radios work on other projects and it is almost like the pins are not correct I traced them and they appear right but......... Has anyone used this board if so did you have any issues? I would say it is my solder job but I did 3 boards one should work.
ANy help would be great.
my experience is different, aliexpress is collected vat on purchase and item was shipped from Netherlands
Price: 11.29€
VAT (collected by Aliexpress): 2.59€
my post office sent me email asking for pay 6.09€ (2.59vat and 3.50 fee) and there is no way of contacting them or sending pre-paid vat just a reference number to pay vat online.
