Search found 73 matches

by Scott.Bonomi
Wed Sep 23, 2020 1:14 am
Forum: ESP-IDF
Topic: Interfacing the Wroom32 with a 1.8v I2C Sensor
Replies: 10
Views: 8273

Re: Interfacing the Wroom32 with a 1.8v I2C Sensor

Sprite makes an interesting comment about connecting to a I2C device. While there is a question of the remote device being able to survive getting 3.3V Inputs, Is there not the corollary of the ESP32 being able to recognize a low voltage one ? As I recall a 3.3V system is normally going to want 70% ...
by Scott.Bonomi
Tue Sep 22, 2020 10:08 pm
Forum: Hardware
Topic: Problem programming ESP32-WROOM-32 on own designed PCB
Replies: 3
Views: 3366

Re: Problem programming ESP32-WROOM-32 on own designed PCB

I do not think the command window gets enough information to be useful. If you are using a J-link, you are probably running openocd somewhere in the background. I suggest you run it with a verbose stored log, with a command something like: openocd -f interface/jlink.cfg -f board/esp32-wroom-32.cfg -...
by Scott.Bonomi
Wed Sep 02, 2020 11:02 pm
Forum: General Discussion
Topic: Approach to sniff Esp packets using Wireshark
Replies: 2
Views: 3782

Re: Approach to sniff Esp packets using Wireshark

Another option is hardwire your laptop, tell it to share the internet and act as a wireless access point, Then connect the laptop to your laptop access point. any packet is wants to sent to or get from the remote server will then be routed through your machine. This adds another IP address in the IP...
by Scott.Bonomi
Thu Aug 27, 2020 9:05 pm
Forum: Hardware
Topic: 54 MHz Noise coupling into output
Replies: 1
Views: 1877

54 MHz Noise coupling into output

I am trying to connect a ESP32-U4WDH to a remote SPI Device using the interface called VSPI. Have t have a 3.3V VDIO because of the internal Flash.. In order to talk to a 1.8VDC device, have to pass all signals through a level shifter before reaching the target. However I am getting a lot of 54 MHz ...
by Scott.Bonomi
Mon Aug 24, 2020 9:20 pm
Forum: General Discussion
Topic: U4WDH are all the Dn Pins used for internal flash?
Replies: 2
Views: 2449

Re: U4WDH are all the Dn Pins used for internal flash?

I agree that the document says that but I was hoping it was more boilerplate than fact. I was not aware that the flash mode for internal could be changed, nice to know.
Thank You
- - Scott
by Scott.Bonomi
Mon Aug 24, 2020 8:06 pm
Forum: General Discussion
Topic: U4WDH are all the Dn Pins used for internal flash?
Replies: 2
Views: 2449

U4WDH are all the Dn Pins used for internal flash?

Looking at the Data lines reserved for internal U4WDH flash memory, I do not see any signals on D0, D2 or D3. I see a 40 Mhx clock on the CLK Line, And I see a 3V data signal on D1. Is D1 the only data line being used under normal operation? Under all operations? I am looking for another GPIO or two...
by Scott.Bonomi
Wed Aug 12, 2020 8:54 pm
Forum: Hardware
Topic: Unknown chip type value from ESP32-WROOM-32U
Replies: 5
Views: 4628

Re: Unknown chip type value from ESP32-WROOM-32U

There could well be an issue with a bit being corrupted by something. If the echo does not match the outbound, then something bad happened. Of course on has to learn how the tools work in detail to know to look for that. I do not yet. When I looked at the top of the original post: ==================...
by Scott.Bonomi
Wed Aug 12, 2020 8:41 pm
Forum: Hardware
Topic: New Custom Board Not communicating with CP2102N
Replies: 5
Views: 5803

Re: New Custom Board Not communicating with CP2102N

Grounding GPIO0 and a reset does allow me to successfully connect by serial. My current application, built from collecting pieces of several the examples to give me a starting point. I am connecting to UART0 for PC communications. Pin GPIO0 is floating, and at 3.3. Apparently we did not put the seri...
by Scott.Bonomi
Tue Aug 11, 2020 8:45 pm
Forum: Hardware
Topic: New Custom Board Not communicating with CP2102N
Replies: 5
Views: 5803

Re: New Custom Board Not communicating with CP2102N

I finally tried using idf.py monitor, without any flash load I am getting repeating messages of: rst:0x10 (RTCWDT_RTC_RESET),boot:0x12 (SPI_FAST_FLASH_BOOT) invalid header: 0xffffffff invalid header: 0xffffffff invalid header: 0xffffffff invalid header: 0xffffffff invalid header: 0xffffffff invalid ...
by Scott.Bonomi
Mon Aug 10, 2020 10:39 pm
Forum: Hardware
Topic: Unknown chip type value from ESP32-WROOM-32U
Replies: 5
Views: 4628

Re: Unknown chip type value from ESP32-WROOM-32U

It looks like the right data but in the little endian order rather than big endian.
I expect that is a setting that can be adjusted in the tool prior to connection