![]() ![]()
In 19200 baud, the firmware updater keeps sending decimal 255 and never receives a response. I have now tried to run the updater in 19200 bauds, and listened in. OK, as I said, I didn't use the PWRKEY button, I used a jumper to connect pin 1 directly to GND. In this way, you don't need to pushing button all the time.īy the way, when push the PWRKEY button PIN1 and PIN2 of SIM900 are connect together. Jimbo.we wrote:You can try to solder a wire to PIN1 of SIM900, and wire it to GND. This afternoon I will probably try to connect the logic analyzer again to see exactly what the update tool sends over the wire. #Simcom flash update tool v1 10 upgrade#I did not use the button for the upgrade process. I did actually connect PIN1 directly to GND and nothing else, as I described. By the way, when push the PWRKEY button PIN1 and PIN2 of SIM900 are connect together. In this way, you don't need to pushing button all the time. Is there a different sequence of steps I should try? Can I ask which baud rate you use for firmware updates? Edited to attach a photo of the setup the TX and RX pins are only connected to my USB/TTL thing at the top left. Also in every case, the Netlight and Status LEDs light up like they would normally do, and Netlight does off after 10-15 seconds.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |