This is a version of the above node except made with a pcb shield to do the wiring. I’ve currently set it up on the kpn IOT network in order to test the triangulation geolocation. It’s sending out a packet every 5 minutes and I’m logging all the responses. I expect that it will run between 6 months and a year which is what the test is all about.
Great to see that posting project & pictures actually inspires people to make the IoT evolve. Great work!
A picture of my LoRaWAN project from last year with a more powerful microcontroller:
More info and specs here; the LoRaWAN Node’s (hardware) are still available for those interested!
Now only some nanoTrackers for software development. Possible make batch. A very specific device. Mainly for observing wild animals. Try ask RAKWireless for production
Now are close - because for customer. Consulting about open source.
In principle, there is nothing complicated there.
The sensors are written. GPS is also named. RAK4200 from RAK.
May be RAK can make for sale or other.
OK, If you go for “VERY SMALL” the RAK4200 seems perfect to me ( no experience with it yet ). But it’s not cheaper as the Arduino Pro Mini/ESP32-WROOM + RFM95 ( 8.49 <-> 1.80 + 3.74 ). I am still very satisfied with my Sandwich Concept
All resources are open and free, the world is my customer.
Heltec CubeCell HTCC-AB02A Includes SMA antenna connector and 1/2 AA battery holder for use with 14250 primary Lithium batteries (Lithium Thionyl Chloride, non-rechargeable)
Size: 56.6 x 24 x 21.5 mm
These are ARM Cortex based with SX1262 and work with the Arduino framework.
Maybe we have to setup a node/development board database with the primary properties (dimensions, supported functions, supported ide, power consumption, vendor/project link). I see passing very interesting possibilities. We (and novices) can learn a lot of all those possibilities for specific applications.
I build an Addon-board for the M5Stack Atom Matrix
Siize of Node is 24x24x24mm
USB-C Connector, I²C Connector, 24 RGB Leds
If you need more informations just drop me a message
Got some spare pcbs left
General comment … small nodes are fun but remember that monopole antennas will not work well.
A monopole is half of a dipole, and the theory works IF the monopole is mounted over an infinite ground-plane. If your node is smaller than INFINITE then it will be degraded.
Better to use a di-pole, which can be done by making the PCB ground a quarter wavelength (approx 8cm). Loop antennas are also good.