SparkFun Forums 

Where electronics enthusiasts find answers.

All things pertaining to wireless and RF links
By geometrixeng
#187500
Hey Everybody,

I am currently using a MG2639 Cellular Shield with a PIC24F host.

I am able to send AT commands from the PIC24F host to the MG2639, and I have confirmed this with my signal analyzer. The transmit pin on the PIC24F host idles HIGH and works as expected (this is how the UART is configured).

But I have noticed that the TX signal from the MG2639 to the RX pin on the PIC24F idles LOW, and I receive nothing whatsoever back from the MG2639. Even if I received nothing back from the MG2639, SHOULDN'T THE TX PIN ON THE MG2639 IDLE HIGH????

TIA,
--NEAL
long long title how many chars? lets see 123 ok more? yes 60

We have created lots of YouTube videos just so you can achieve [...]

Another post test yes yes yes or no, maybe ni? :-/

The best flat phpBB theme around. Period. Fine craftmanship and [...]

Do you need a super MOD? Well here it is. chew on this

All you need is right here. Content tag, SEO, listing, Pizza and spaghetti [...]

Lasagna on me this time ok? I got plenty of cash

this should be fantastic. but what about links,images, bbcodes etc etc? [...]