Search found 50 matches

by kostyan5
Mon Apr 09, 2018 7:46 pm
Forum: General Discussion
Topic: Flash write speed
Replies: 1
Views: 5135

Flash write speed

Hello, We recently switched the SPI flash chip on our product. We went from Winbond (W25Q32JV) to Macronix (MX25R3235F). For some reason flash write speeds decreased by a factor of 3. This includes both flashing and formatting SPIFFS speeds. With winbond we were able to flash fw or format spiffs in ...
by kostyan5
Mon Jan 29, 2018 2:45 pm
Forum: General Discussion
Topic: RF Certifications Test Suite
Replies: 1
Views: 3350

RF Certifications Test Suite

Hi,

Is there a test suite for doing RF certifications? We need to do FCC, UL, and CE. Is there firmware that will cycle through all channels, data rates, etc.?

Thanks,

Konstantin
by kostyan5
Thu Jan 25, 2018 3:45 pm
Forum: ESP-IDF
Topic: esptool fatal error
Replies: 3
Views: 4887

Re: esptool fatal error

ESP_Angus, thanks for help. Updating esp tool to 2.2.1 fixed the issue.
by kostyan5
Wed Jan 24, 2018 10:35 pm
Forum: ESP-IDF
Topic: esptool fatal error
Replies: 3
Views: 4887

esptool fatal error

Something was recently changed in ESP-IDF and now I can no longer program at 1500000 baud. The max it will do is 115200. Anything higher than that and I get: A fatal error occurred: Invalid head of packet Any ideas what could be causing this? Nothing changed but the esp-idf was updated. 1500000 baud...
by kostyan5
Thu Jan 11, 2018 3:07 pm
Forum: Hardware
Topic: What are Main Crystal requirements?
Replies: 3
Views: 7620

Re: What are Main Crystal requirements?

Current data sheet and hardware design guide for ESP32 only mentions the frequency of the main crystal. Are there stability and accuracy requirements? We currently use 10ppm, but 40-50ppm are cheaper. Are those an option?
by kostyan5
Mon Nov 06, 2017 6:26 pm
Forum: General Discussion
Topic: Pre-programming flash at manufacturing
Replies: 4
Views: 9323

Re: Pre-programming flash at manufacturing

What's the easiest way to combine the 3 separate bin files into one single bin?
by kostyan5
Fri Oct 20, 2017 2:25 pm
Forum: General Discussion
Topic: NVS and wear leveling
Replies: 2
Views: 6741

NVS and wear leveling

Does NVS use wear leveling? If not, any plans to support it?

In our use case, we update a value in NVS every few mins and would hit 100,000 in about a year.
by kostyan5
Sun Oct 01, 2017 6:34 pm
Forum: Hardware
Topic: ADC input impedance
Replies: 6
Views: 19257

ADC input impedance

Does anyone know... what is the input impedance of the ADC? Also, what are the resistor values of the attenuator pad?
by kostyan5
Mon Aug 21, 2017 8:56 pm
Forum: Hardware
Topic: WiFi power spikes
Replies: 4
Views: 8077

WiFi power spikes

We have a custom ESP32 board and we're seeing periodic current spikes (thin blue lines on attached image) to about 400mA. This seems to be related to WiFi operation as it doesn't happen if WiFi is off. They are very short so we suspect it's just an artifact of WiFi radio turning on. Has anyone exper...
by kostyan5
Fri Jul 28, 2017 11:38 pm
Forum: General Discussion
Topic: Unexpected TG1WDT_SYS_RESET in deep sleep
Replies: 3
Views: 5649

Re: Unexpected TG1WDT_SYS_RESET in deep sleep

WiFive wrote:So this happens right away, the int watchdog resets the chip before it makes it to deep sleep?
It happens within a couple of seconds. I don't know if the chip actually makes it to sleep before it resets.