Thanks both for answering me.
I think, small USB dongle gateway is “must have”, so hurry up
Some time before, I was searching for small wireless module, which I can place (stick) wherever I want and sens things remotely. Collect all data, examine and maybe do some (home) automation on it. My requirements was:
- Battery powered. (from single button cell, but for some application maybe external powered…)
- Small. Very small.
- Able to sense: digital input, impulse input, temperature, humidity, …
- Cheap. Very cheap. (as I need many modules and budget is always small)
As I did not find any product which meets my needs, I decided to build my own. As universal module will never be small and cheap (like BC Core+Battery+Tag+Tags modules), many variants of PCB with single purpose may be the answer.
ESP8266 was very promising. Very small and very cheap chip, with possibility to implement simple single purpose software right inside it - so no additional parts needed. Against it was custom PCB design of radio part (which is behind my knowledge) and mainly that it is not very good choice or battery applications…
Then I found BigClown project and I like it’s open idea. So I delayed my plans until some first products was published. Finally I was a little bit disappointed with first hardware modules (Bridge+Tag), because it was’t usable for me. Then I waited again for first wireless module, but…it was big (both size&price:)
It seems that BigClown project is still in starting phase, so maybe there is some space to play also with (side) ideas like mine.
Basic idea of single purpose wireless module based on BC Core Module:
- 1x MCU
- 1x RADIO
- 1x AUTH
- 1x LED
- 1x Power supply circuit (battery/external powered 5/12V)
- 1x power connector (or only soldering pads)
- 1x connector for IO (or only soldering pads)
- 1x passive parts for simple IO, one of:
- digital input (for NO/NC contact, magnetic contact, optical sensor, etc)
- digital input 230V
- temperature sensor
- humidity sensor
- digital output (FET/SSR, for externaly powered version)
- digital output (230V Relay, for externaly powered version)
- UART interface (TTL)
I think that HW like this may be (hope)fully compatible with SW for original BC Core Module.