StefanoZ

Hello all, I developed a project to remotely control a little yatch. The project is made up by a Netduino, a cellular shield (sparkfun), an LCD key pad shield and a real time clock. The target is to send a short message when an event occurs (e.g. water near the engine!). All is working fine, but I need to power the project with a battery. I tried to use a 9 volts battery, but the project run out of battery in 7 hours with the LCD backlight switched off. The project does not use infinite while loop (it uses interrupt). The alternative to the 9 volts battery is to use the yatch battery (the same as a 12 volts car battery), but I would not run out of that battery and I don't know if 12 volts are supported for all the shields. Do you have any suggestions to minimize power consumption? What is the best way to power this kind of project? Bye! Stefano.

Hi gurus, First of all let me wish you a healthy and successful 2011! I am trying to interface an old Ericsson T28 mobile phone to the Netduino using its phone data cable (why buying a new GSM shield if my drawers are filled with electronic waste?). I successfully interfaced this mobile phone using Windows Hyper Terminal but I am not able to achieve the same result with the Netduino. This is the problem. - I open the COM1; - I send an "AT\r" command to the COM1; - I read the COM1 and I find the same 3 bytes I sent ("AT\r") instead of the "OK" answer. Is it correct to use the \r to close the message string? Is it correct that the COM1.write works even if the mobile phone is not connected? What do you think I need to check? Bye! Stefano.