You can send and receive short messages from anywhere on Earth with a clear view of the sky using the RockBLOCK Plus Satellite Communication Device. It operates in areas where WiFi and GSM networks aren't available. Maybe you wish to send weather data from the middle of the ocean? Or use it to command your robot in the middle of nowhere? Maybe you need to communicate in an emergency and other networks are unavailable? You can use the RockBLOCK+ to assist you. The built-in power regulator of the RockBLOCK Plus Satellite Communication Device accepts 9-30v DC. An Iridium 9602 modem is at the heart of RockBLOCK. The 9602 is housed in the RockBLOCK Satellite Communication Device, which also serves as its antenna and power supply. It exposes the modem’s serial interface via RS-232.
3m 9-30v DC input
Built in Antenna
4cm high, 13cm diameter (+cable)
IP68 certified (submersible up to 1m indefinitely)
How to control the sleep pin? The sleep signal is internally pulled high on the RockBLOCK and RocKBLOCK+ products, so you can leave it disconnected if you want to leave the modem 'awake' all of the time. To turn 'off' the modem, pull the line to ground.
Unit refuses to give me data using the SBDRT command? If you are using the SBDRT command, and the modem appears to 'hang' when you issue the command, it is probably due to flow control configuration. The default state for the RockBLOCK and RockBLOCK+ units has flow control turned ON in the modem. When running in 3-wire serial mode, flow control should be turned OFF, which will ensure you get responses to your requests. Use the command AT&K0 at the start of your command sequence. This turns flow control off, and should solve the problem.
Added this to my setup on my boat, very nice piece of equipment. Apollo's service and support has really been the best, I honestly wouldn't go anywhere else.