Search found 22 matches

by anakyr
Wed Oct 24, 2018 11:54 am
Forum: General Discussion
Topic: Auto flashing error (GPIO0 need to be manually set low)
Replies: 2
Views: 205

Re: Auto flashing error (GPIO0 need to be manually set low)

Probably one of your two transistors is broken, that control the DTR RTS signals.
by anakyr
Wed Oct 24, 2018 11:48 am
Forum: General Discussion
Topic: SCW Tx command for measuring radiated power has a bug??
Replies: 0
Views: 122

SCW Tx command for measuring radiated power has a bug??

Hello, I have tested the radiated power of an esp-wroom-32 module using the wifiscwout command and I found problems with parameter 3. What I understand from the documentation is that when parameter 3 is 0, I should have the highest power and then for every single unit attenuation increases 0.25dB. U...
by anakyr
Tue Oct 23, 2018 1:29 pm
Forum: General Discussion
Topic: WROOM antenna radiation pattern
Replies: 2
Views: 1172

Re: WROOM antenna radiation pattern

Isn't there an official test of Espressif of the radiation pattern?
I am interested for WROOM-32D
by anakyr
Thu Oct 11, 2018 12:15 pm
Forum: General Discussion
Topic: SPI Maximum speed
Replies: 12
Views: 2187

Re: SPI Maximum speed

Thanks a lot for the answers. Using this dummy flag I was able to produce 40 MHz at the MOSI.
by anakyr
Thu Oct 11, 2018 11:56 am
Forum: General Discussion
Topic: Can the output current of the esp32 GPIO be reduced?
Replies: 16
Views: 6676

Re: Can the output current of the esp32 GPIO be reduced?

Hi, I read the previous posts but I think they still are not quite clear. So the version of ESP32 now is using the 5,10,20,40 mA levels? Apart from that, this current is the total current the CPU supplies to all the pins? Meaning that in each pin the current is much lower, if more than one pins are ...
by anakyr
Wed Oct 10, 2018 11:52 am
Forum: General Discussion
Topic: SPI Maximum speed
Replies: 12
Views: 2187

Re: SPI Maximum speed

I'm 100% sure that I have a 40MHz crystal. Check attachment too. I will try first to include SPI_DEVICE_NO_DUMMY in order to ignore this checking, as the error message in red is saying. If it doesn't work, I will go to the registers :)
by anakyr
Wed Oct 10, 2018 10:45 am
Forum: General Discussion
Topic: SPI Maximum speed
Replies: 12
Views: 2187

Re: SPI Maximum speed

I am using ESP-WROOM-32D module on the devkitc. I see that the module has a 40 MHz crystal.
Then how can I verify what you say about the internal bus clock? Where is that located? Isn't that derived from the CPU's clock as well?
by anakyr
Wed Oct 10, 2018 9:57 am
Forum: General Discussion
Topic: SPI Maximum speed
Replies: 12
Views: 2187

Re: SPI Maximum speed

I am having the same issue, but probably has to do with the CPU frequency. I can measure SPI at maximum 26 MHz. When I set it at 40, my scope doesn't show any signals. How can I change the CPU frequency higher? Is the function included in one of the examples?
by anakyr
Fri Oct 05, 2018 8:25 am
Forum: General Discussion
Topic: Dev Kit C without the external pins
Replies: 2
Views: 261

Dev Kit C without the external pins

Hi,

I would like to mount ESP32-DevKitC-32D on a fixture to test vibration.
Is there any ESP32-DevKitC-32D on the market without the long pins around it?
Meaning the ones in the picture attached.
Those pins don't allow me to mount my board on the fixture as wished.
by anakyr
Thu Sep 20, 2018 11:19 am
Forum: General Discussion
Topic: How can I talk to the rom bootloader
Replies: 5
Views: 368

Re: How can I talk to the rom bootloader

Actually I disoldered the module WROOM from the devkitc and I only connected the UART pins, VCC, ground and EN and GPIO0 to gnd with buttons the last two of them. So if I don't press the button ENABLE and GPIO0 are floating if I press the button the go low. I wanted to verify that I can program the ...

Go to advanced search