XAmbi Kid mini Pro - Prototype

[Frank Herrmann]

Hi Friends,

here some videos (german!) about my new "XAmbi Kid mini pro":

https://www.youtube.com/playlist?list=PLYPTUTcLMTK4jhJH769SKW6X1YBWLqYL7

You can use three different Transceivers:

• RFM70 or NRF24L01(SMD) with mysensors.org library
• RFM12B or RFM69X with jeelib library

The PCB are shared at oshpark: https://oshpark.com/shared_projects/ezK4aEQd

And here some Features:

• use a normal Arduino mini pro as stacked interface
• optional you can add Magnetometer HML3358 and/or SHT21 (Temperature/Humidity)
• powered via coincell CR2032
• small Footprint (25mm x 41mm)
• holes to screw on a enclosure
• extra pins for D2 - D9 for ur external sensors
• extra I2C pins
• Flash for OverTheAirUpdate's

Some Features are not testet now, but i will publish some news about this Project here.

You like it? You want some more Informations?

Ok, write here in this thread :)

cu xpix

[bjornhallberg]

Nice design! Are you happy with the NRF24L01(SMD) or did you experience any range issues?

[Frank Herrmann]

I really happy with smd version from nrf24l01. Cuz i use as gateway a very old nrf24l01 (2 years ago got at ebay) with a green PCB and 10 pins.

After flash a test prg, it comunicate with this old chip. The range ... hmm, i have no idea. All my prototypes are at the worbench now. But i'll make a small rangetest at the weekend.

... make a better photo in next day's :)

[Mickey]

My experience with the smd range very similar to the usual nrf modules.

[Frank Herrmann]

Here some better Pics from Prototype:

[Frank Herrmann]

Here with installed HML5883 Magnetometer, but sadly doesn't work.

Don't know why, but i decided to rework the design and replace all I2C sensors with a Solarcharger/Supercap-PowerSupply and add a voltage booster for 5V.