Reading this has reminded me of something I wanted to explore in the past. Most of my applications/requirements for a Pi include GSM, but I've found GSM modules to be very expensive, often being more expensive than the Pi itself.
The author mentions a mobile USB modem, and it's just dawned on me that older 3G/HSDPA dongles are often very cheap. Does anyone have experience using them, especially what power implications they bring?
They do bring a bit of bulkiness on the Pi, and are easy to steal, but then if one can access the modem, the whole Pi might be at risk too.
The author mentions a mobile USB modem, and it's just dawned on me that older 3G/HSDPA dongles are often very cheap. Does anyone have experience using them, especially what power implications they bring?
They do bring a bit of bulkiness on the Pi, and are easy to steal, but then if one can access the modem, the whole Pi might be at risk too.