| ??? 05/03/05 06:36 Read: times |
#92771 - Echo Responding to: ???'s previous message |
Vishal Malik said:
I have connected the Rx pin on '51 to PC's COM port That's a very bad idea! The PC's COM: port uses proper bipolar RS232 levels: +/-12V! Not good for '51 port pin! I receive the following on my Hyperterminal
AT OK whereas the response is only OK ..even AT is being echoed on the Hyperterminal. Sounds like you've set your modem to echo received characters. Or maybe there's a fault in your cable, shorting Tx & Rx...? |
| Topic | Author | Date |
| GSM Phone Interfacing with PC & MCU | 01/01/70 00:00 | |
| AT commands? | 01/01/70 00:00 | |
| re-AT commands? | 01/01/70 00:00 | |
| Give up! | 01/01/70 00:00 | |
| Indeed | 01/01/70 00:00 | |
| No, they don't. | 01/01/70 00:00 | |
| Hayes ? | 01/01/70 00:00 | |
| No data, No AT | 01/01/70 00:00 | |
| mobiles and AT commands | 01/01/70 00:00 | |
| *DID* Search first! | 01/01/70 00:00 | |
| I think you've been had | 01/01/70 00:00 | |
| Buying stuff in "local market" | 01/01/70 00:00 | |
| RE-Buying stuff in "local market" | 01/01/70 00:00 | |
| Use Nokia. | 01/01/70 00:00 | |
| Why? | 01/01/70 00:00 | |
| AT response receive problem | 01/01/70 00:00 | |
| bad Rx on '51? | 01/01/70 00:00 | |
| Re: bad Rx | 01/01/70 00:00 | |
| Echo | 01/01/70 00:00 | |
| RS232 | 01/01/70 00:00 | |
| Inverted? | 01/01/70 00:00 | |
| post the whole code! | 01/01/70 00:00 | |
| thats right | inverted? | 01/01/70 00:00 | |
| inversion | 01/01/70 00:00 | |
| Hyperterminal? | 01/01/70 00:00 | |
| how??? | 01/01/70 00:00 | |
| No | 01/01/70 00:00 | |
| I gave up | 01/01/70 00:00 | |
| Level converter circuit diagram | 01/01/70 00:00 | |
| Waiting for GSM Modem | 01/01/70 00:00 | |
| AT-command | 01/01/70 00:00 | |
| More Information Seimen C35 | 01/01/70 00:00 | |
| SMS trough PC | 01/01/70 00:00 | |
| Thanks Khaled Sarsam | 01/01/70 00:00 | |
| Level convertor??? | 01/01/70 00:00 | |
| i get your point ! | 01/01/70 00:00 | |
| use a dvice like max232 | 01/01/70 00:00 | |
| Problem solved | 01/01/70 00:00 | |
My experiences... | 01/01/70 00:00 |