search

MarcoMartines / GSM-GPRS-GPS-Shield

GSM/GPRS & GPS Shield Library for modules using SIM900/SIM908
GNU General Public License v2.0
208 stars 152 forks source link

GSM Shield does not work using External Power Supply #23

Open ronistiawan opened 9 years ago

ronistiawan commented 9 years ago

I'm using Icomsat GSM Shield, it works perfectly fine if it's attached on arduino board. but it doesn't give correct respons if I use external power supply. what could be the problem?

madmaze commented 9 years ago

is there a level shifting issue? 5V vs 3.3v? Can your external power supply provide enough power? or loose connections perhaps?

ronistiawan commented 9 years ago

I tried using 4.5V, 6V, and 9V. but the shield didn't work.

vannut commented 9 years ago

How much power can it produce? The sim chip needs a lot of power.

Op zaterdag 13 juni 2015 heeft Roni Stiawan notifications@github.com het volgende geschreven:

I tried using 4.5V, 6V, and 9V. but the shield didn't work.

— Reply to this email directly or view it on GitHub https://github.com/MarcoMartines/GSM-GPRS-GPS-Shield/issues/23#issuecomment-111654230 .

/-- Met vriendelijke groeten Richard Verbruggen

Van Nut - maatwerk webapplicaties voor de zorg en mkb

085 - 4016 326 | richard@vannut.nl richard@vannut.nlMunsterplein 2D, 6041HD Roermond