Search found 17 matches

by rmetzner49
Sun Aug 26, 2018 3:03 am
Forum: ESP32 Arduino
Topic: ESP32-DevKitC-32D Upload to Flash Problems
Replies: 11
Views: 6048

Re: ESP32-DevKitC-32D Upload to Flash Problems

I ended up using the FT231XS in my design since in prototype runs, it's still possible to hand solder a TSOP-20. The QFN has all the pads under it and really hard to place by hand. No problems using that device.

Bob M.
by rmetzner49
Tue Jul 31, 2018 2:14 pm
Forum: ESP32 Arduino
Topic: ESP32-DevKitC-32D Upload to Flash Problems
Replies: 11
Views: 6048

Re: ESP32-DevKitC-32D Upload to Flash Problems

Kolban has done it again. I can successfully upload IF I hold the BOOT button down until just before the bar graph is finished. I guess Arduino cycles DSR/DTR at that point and the button overrides those signals. I should also note that once a sketch is uploaded, pressing RESET, then holding BOOT wh...
by rmetzner49
Tue Jul 31, 2018 2:11 pm
Forum: ESP32 Arduino
Topic: ESP32-DevKitC-32D Upload to Flash Problems
Replies: 11
Views: 6048

Re: ESP32-DevKitC-32D Upload to Flash Problems

Come to think of it, messing with the RST line on the 2102 won't work since that's where DSR/DTR originate.

Bob M.
by rmetzner49
Tue Jul 31, 2018 2:05 pm
Forum: ESP32 Arduino
Topic: ESP32-DevKitC-32D Upload to Flash Problems
Replies: 11
Views: 6048

Re: ESP32-DevKitC-32D Upload to Flash Problems

Hi Angus; I think you are on to something there. On a fresh boot, with Arduino pointing at COM57 I get the traditional diagnostics correctly. Then when trying to upload a sketch, I get "A fatal error occurred: Failed to connect to ESP32: Timed out waiting for packet header Board at COM57 is not avai...
by rmetzner49
Mon Jul 30, 2018 7:20 pm
Forum: ESP32 Arduino
Topic: ESP32-DevKitC-32D Upload to Flash Problems
Replies: 11
Views: 6048

Re: ESP32-DevKitC-32D Upload to Flash Problems

According to the schematic, it has the CP2102N-A01-GQFN28. As I said in the O.P., Windows recognizes it as COM57. All this is supported at http://esp-idf.readthedocs.io/en/latest/get-started/get-started-devkitc.html but that doesn't get me any closer to identifying the problem. I was just looking to...
by rmetzner49
Mon Jul 30, 2018 4:29 pm
Forum: ESP32 Arduino
Topic: ESP32-DevKitC-32D Upload to Flash Problems
Replies: 11
Views: 6048

Re: ESP32-DevKitC-32D Upload to Flash Problems

Thanks, I'll try that when I get some more time. In the meantime, I've ordered another one from Ebay, Ezsbc which I had before and it worked. I can see myself spending hours on debugging this. By the way, I enjoyed your PWM object and used it for my son's Wheelchair Controller; it needed RC-Servo ty...
by rmetzner49
Mon Jul 30, 2018 1:10 pm
Forum: ESP32 Arduino
Topic: ESP32-DevKitC-32D Upload to Flash Problems
Replies: 11
Views: 6048

ESP32-DevKitC-32D Upload to Flash Problems

I recently purchased this board from Mouser because I wanted a robust unit to develop with. I have also in past purchased other versions of an ESP32-Dev board from Ebay vendors. I also have an Adafruit ESP32 Feather and am using Arduino 1.83. Up until this recent purchase I've had no trouble uploadi...
by rmetzner49
Wed Apr 11, 2018 12:42 pm
Forum: General Discussion
Topic: PCB design with esp32
Replies: 21
Views: 13872

Re: PCB design with esp32

ESP_Sprite:

"I have never seen a circuit design that feeds the power back into the power supply." Do you know what the term "Regenerative Drive" means as it relates to Motor Control? That's exactly what a Four Quadrant Motor Drive does.
by rmetzner49
Wed Apr 11, 2018 12:38 pm
Forum: General Discussion
Topic: PCB design with esp32
Replies: 21
Views: 13872

Re: PCB design with esp32

ESP_Sprite:

And what happens when the current in the coil reverses and the fly-back effect exceeds supply voltage? Isn't that exactly how a Boost Converter operates?
by rmetzner49
Tue Apr 10, 2018 5:35 pm
Forum: General Discussion
Topic: PCB design with esp32
Replies: 21
Views: 13872

Re: PCB design with esp32

Veder_Mester: "Reason is mostly the stability and low ripple of an LDO." That just isn't so. It's done for simplicity in systems where you need both 5V and 3.3V. You don't have to dissipate a lot of power to get from 5V to 3.3V, but you DO have a problem trying to get from 12 or 15V down to 5V or 3....

Go to advanced search