Raspberry PI + c-uGSM/d-u3G/h-nanoGSM shield, using only 5V Raspberry PI power supplies
Modules, parts used
a. Raspberry PI 3 / 2 / ZERO / B+ board
b. Raspberry PI 5V wall power supply adapter
c. i-HAT3GGSM adapter prepared as shown in page 2.
d. c-uGSM / d-u3G / h-nanoGSM shield equipped with straight pin-headers
e. Lithium Polymer battery (to be connected to the 3G / GSM shield)
i-HAT3GGSM solder jumpers configuration recap
- JP1 - CIRCUIT OPEN (not connected) default ==> CIRCUIT CLOSED (connected) REQUIERED
- JP2 - CIRCUIT CLOSED (connected) default
- JP3 - CIRCUIT CLOSED (connected) default
- JP4 - CIRCUIT OPEN (not connected) default
IMPORTANT, DO NOT FORGET: make short/solder over JP1 (connect 5V from RPi with Vin 5V on the GSM / 3G module), as in up-here picture.
Put all parts and modules together
a. Double check boards for soldering short-circuits.
b. Notice in picture the side/position on RPI extension connector. Same for the c-uGSM / d-u3G shield modem connector.
c. Insert boards connectors gentely (plug the bords together).
d. Connect the LiPOL battery.
e. Connect keyboard, mouse, DVI, ethernet..
f. Plug the RPi USB power cable.
DONE!
Go to the next page to see other configuration.
The configuration described above, it is the most convenient and resilient way of interfacing any flavour of Raspberry PI (or other RPI ARM boards) with our modular modem shields [l-LTE, d-u3G, c-uGSM or h-nanoGSM].
Hints:
- You can use Lithium Polymer batteries as smallest as 75mAh.
- The Lithium Polymere battery can be replaced with one super-capacitor, bigger than 1F, rated for more than 5V and having ERS lower than 250mOhm. We've made tests using SCMT22C505MRBA0 from AVX and PM-5R0H105-1 from POWERSTOR/EATON.
- You can use Lithium Polymer batteries as smallest as 75mAh.
- The Lithium Polymere battery can be replaced with one super-capacitor, bigger than 1F, rated for more than 5V and having ERS lower than 250mOhm. We've made tests using SCMT22C505MRBA0 from AVX and PM-5R0H105-1 from POWERSTOR/EATON.