Hi,
I have 2 Sim900 A6 connected to Picaxe 28X2 (with an AXE 033 LCD attached) and I power the 28X2 from the A6:
VCC_IN on A6 to Picaxe Pin 20 (+V)
GND on A6 to Picaxe Pin 19 (-V)
U_TXD on A6 to Picaxe Pin 18 (hserin)
U_RXD on A6 to Picaxe Pin 17 (hserout)
The A6 is powered by a micro USB providing 5 V and 2 A.
That has worked for a while for both A6, but now I cannot talk to any of the A6 - I dont get a response to AT, etc.
I have tried to set RST on the A6 low for 100 ms, but that did not help (should it?).
Is my setup not allowed and have I destroyed the A6?. Any ideas?
Best regards
torben
I have 2 Sim900 A6 connected to Picaxe 28X2 (with an AXE 033 LCD attached) and I power the 28X2 from the A6:
VCC_IN on A6 to Picaxe Pin 20 (+V)
GND on A6 to Picaxe Pin 19 (-V)
U_TXD on A6 to Picaxe Pin 18 (hserin)
U_RXD on A6 to Picaxe Pin 17 (hserout)
The A6 is powered by a micro USB providing 5 V and 2 A.
That has worked for a while for both A6, but now I cannot talk to any of the A6 - I dont get a response to AT, etc.
I have tried to set RST on the A6 low for 100 ms, but that did not help (should it?).
Is my setup not allowed and have I destroyed the A6?. Any ideas?
Best regards
torben