- Sat Feb 13, 2016 2:09 pm
#41048
Hi folks,
I'd really appreciate any ideas and suggestions to solve my problem with my (3rd) ESP-07 board.
I try to follow chronology and explain it clearly.
Since this was my third attempt to deal with a board like that I made nice solid pins for it using male header pins. I bent them to match the raster of the board while the lower section surrounded by plactic casing remained untouched to fit the breadboard. After soldering I've removed the plastic so the board can fit the breadboard pretty deeply hopefully providing a good contact.
I am using an FTR232RL USB/serial (capable of 3.3V) and an external PSU at 3.5V/1A, and a 100uF capacitor near the board's Vcc pin.
Connections:
Tx-Rx
Rx-Tx
GPIO15-Gnd
EN(CH-PD)-Vcc
Arduino IDE 1.6.7, baud 115200, ESP 2.0.0 stuff installed.
At first startup blue LED on board went off, on serial monitor I had the board "ready".
AT commands worked, I had the firmware checked, I made it to connect to my router.
Then I uploaded the 'blink' sketch (pulled GPIO 0 to Gnd and reseted the board. Worked perfectly, the LED connected to GPIO2 started blinking in phaseshift with the blue one on board.
Modified the sketch (only the timing) and uploaded again. Worked fine again.
Since the third upload attempt any upload fails.
When I power up the board it fills the serial monitor with thrash through long-long minutes, then it stops. When I try to upload anything I get various error messages like: "unslip sequence wrong", or "espcomm_open failed" and such.
Then the board seems to got stucked in bootloader state since the blue LED doesn't light up anymore (GPIO0 is not grounded obviously).
Then I touched the CH_PD jumper wire (insulated of course) and the blue LED stasrted blinking along with one on the FTDI and gibberish stasrted filling the serial monitor.
I disconnected the wire from 3.3V and left floating. As long as I hold it, the board is 'broadcasting' trash...
Made a short vid of it:
Do you have any idea what is going on here? Thank you in advance.
I'd really appreciate any ideas and suggestions to solve my problem with my (3rd) ESP-07 board.
I try to follow chronology and explain it clearly.
Since this was my third attempt to deal with a board like that I made nice solid pins for it using male header pins. I bent them to match the raster of the board while the lower section surrounded by plactic casing remained untouched to fit the breadboard. After soldering I've removed the plastic so the board can fit the breadboard pretty deeply hopefully providing a good contact.
I am using an FTR232RL USB/serial (capable of 3.3V) and an external PSU at 3.5V/1A, and a 100uF capacitor near the board's Vcc pin.
Connections:
Tx-Rx
Rx-Tx
GPIO15-Gnd
EN(CH-PD)-Vcc
Arduino IDE 1.6.7, baud 115200, ESP 2.0.0 stuff installed.
At first startup blue LED on board went off, on serial monitor I had the board "ready".
AT commands worked, I had the firmware checked, I made it to connect to my router.
Then I uploaded the 'blink' sketch (pulled GPIO 0 to Gnd and reseted the board. Worked perfectly, the LED connected to GPIO2 started blinking in phaseshift with the blue one on board.
Modified the sketch (only the timing) and uploaded again. Worked fine again.
Since the third upload attempt any upload fails.
When I power up the board it fills the serial monitor with thrash through long-long minutes, then it stops. When I try to upload anything I get various error messages like: "unslip sequence wrong", or "espcomm_open failed" and such.
Then the board seems to got stucked in bootloader state since the blue LED doesn't light up anymore (GPIO0 is not grounded obviously).
Then I touched the CH_PD jumper wire (insulated of course) and the blue LED stasrted blinking along with one on the FTDI and gibberish stasrted filling the serial monitor.
I disconnected the wire from 3.3V and left floating. As long as I hold it, the board is 'broadcasting' trash...
Made a short vid of it:
Do you have any idea what is going on here? Thank you in advance.
