Solar Stalker V2 and GSM shield

Products & Technology Arduino & Seeeduino
#1

I am interested in the above, but read comments that the solar panel and Li On battery dose not work with this combination. Is this true and if so why.

Thanx, Graham

#2

The GPRS shield needs 2A peak current. IDLE mode needs about 22mA; TALK mode is about 250mA; DATA mode highest current is about 450mA. As long as your power supply satisfies the above current requirement, it will work.

#3

Jimbo … thanx … Graham

#4

Hi, I am considering a similar usage, and I have 3 questions :

  • When using SMS, would you consider it Data usage with max. 450mA current which would be Ok ? Or is it only the GPRS/TCP mode ?
  • Other way to look at it : would you know when 2A are drawn so that I avoid this use case ?
  • The step-up converter of the Solar Shlield is LM3224 and the specs I find show a max current slightly over 2A, so where does the limitation come from ? Would a small heatsink help ?

Thanks for your help ! Arduino+GPRS+Solar Charger staked look just great !!!