The iot_power&sensor board (the had/piggyback for the iot_lora board) v1.0 as promised.
Power alternatives are: CR2032/2xAAA controlled by TPS61291, TPL5111 and/or TPS22860.
AAA box (€0.57)
The booster (TPS22860) can be bypassed.
ATTENTION: This is version V1.0, not tested yet (is in order). Improvements, suggestions? Let me know!License: CC-BY 4.0
ESP-12 WiFi node supporting services for years with a CR2032 coin cell battery (see for the concept: http://www.ti.com/tool/TIDA-00484). Partial tested yet, I'll keep you posted.
ATTENTION: Don't order this board, There will be a new version soon.License: CC-BY 4.0
RFM95 Breakout Board
Breadboard friendlyLicense: CC-BY-SA 4.0
This design (equipped with the VT-s02c module from Vincent Tang/China holding a CC1310 from Texas Instruments) is an IoT node supporting services for 10 years with a CR2032 coin cell battery (see for the concept: http://www.ti.com/tool/TIDA-00484). partial tested yet, I'll keep you posted.
ATTENTION:This is the updated version V2.0 (now with booster).
1 x VT-s02c/CC1310
1 x JTAG connector (JP4)
1 x 220 (R4, optional)
1 x LED (LED1, optional)
1 x TPS61291
1 x 3,3uH (L1)
1 x 10uF (C4)
1 x TPL5111 (U3)
1 x 0.1uF (C3)
1 x 47K (R1)
1 x 10K (R2)
1 x TPS22860 (U5)
1 x 1uF (C1)
1 x 0.1uF (C2)
1 x MAX30205
2 x 10K (R5, R6)
2 x pinheader (JP1, JP2)
1 x pinheader (JP3)
This design (a RFM95W controlled by an Arduino Pro Mini) is my first step in the world of IoT. The board is tested with raw.ino from the Matthijs Kooijman LMIC library (https://github.com/matthijskooijman/arduino-lmic) and works fine.
A second PCB design is planned as sensor/power supply board as piggyback for the iot_lora. Power alternatives will be: solar cell, CR2032, 2 x AAA, Supercap, TPS61291, TPL5111 and/or TPS22860.
ATTENTION:The update to V2.0: ADC6 and ADC7 (analog exclusivily) are not connected to JP3 anymore but PB0 and PB1 (possibility for soft serial). The HF part has now a switch to SMA or spring antenna and added are GND planes on both sides.
1 x RFM95w/868MHz
1 x Arduino Pro mini
2 x 10K (R1, R2 for I2C pull up's)
Wemos D1 shield for 2 buttons/switches ,6 LEDs, temperature sensor and photoresistor*.
Pinheads for all data lines available.