For that price, lots of people have had the opportunity to explore the module itself, and [marcrbarker] shows some of the extra, unadvertised, features it has. Acting as a GSM module that can send ...
The shield is based around the SIM900 GSM/GPRS radio module, and is compatible with the SIM908 GSM/GPRS module that adds a GPS receiver. Also on board this shield are a pair of 1/8″ audio ...
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