Search found 62 matches

by kbaud1
Mon Jun 15, 2020 4:02 pm
Forum: General Discussion
Topic: Is 5-6V safe on non-ADC IO pins?
Replies: 1
Views: 418

Is 5-6V safe on non-ADC IO pins?

We powered an ESP32 with 3.3V, and we programmed every IO pin to slowly cycle high/low in open drain output mode with pullups and pulldowns disabled. We then checked for a voltage drop across a 3.3K resistor connected from 5V to each pin. Of course we saw about 5V when the pin switched low, but when...
by kbaud1
Mon Jun 08, 2020 3:00 pm
Forum: General Discussion
Topic: undocumented UART Hardware problem?
Replies: 7
Views: 1796

Re: undocumented UART Hardware problem?

We see that the above github discussion of this problem is extensive and ongoing. Is there going to be a hardware change to correct it? (A software change probably won't help us since we're directly accessing memory.) We confirmed that our results are similar to those reported by rojer: The problems...
by kbaud1
Tue Jun 02, 2020 9:15 pm
Forum: General Discussion
Topic: ESP32 AP DNS sets multicast/broadcast routes, breaks other connections
Replies: 0
Views: 424

ESP32 AP DNS sets multicast/broadcast routes, breaks other connections

ESP32 AP DNS sets multicast/broadcast routes, breaks other connections As described here: https://www.esp32.com/viewtopic.php?t=4909, the ESP32 wifi AP drivers create a default route that can break internet connections to clients who have other network connections: This problem can be solved by zero...
by kbaud1
Mon May 25, 2020 3:53 pm
Forum: General Discussion
Topic: dedicated connection. reducing unnecessary traffic to the esp32
Replies: 0
Views: 438

dedicated connection. reducing unnecessary traffic to the esp32

Laptop using wi-fi for internet access looses connection to internet when a second dongle is used to to connect to an ESP32 at the same time. Also: Reducing unnecessary traffic to the ESP32 to reduce energy consumption and improve cpu availability. We noticed that when a Windows computer connects to...
by kbaud1
Thu May 14, 2020 4:33 pm
Forum: General Discussion
Topic: move file from SPIFFS to OTA partition
Replies: 1
Views: 482

move file from SPIFFS to OTA partition

Our product has a customer pc (usually windows 10) that connects wirelessly to an esp32. We want to be able to update the firmware from time to time without having to run a ftp or web server on the customer machine (and all the problems that entails). Our windows application already has a tcp connec...
by kbaud1
Sat May 09, 2020 12:36 am
Forum: General Discussion
Topic: undocumented UART Hardware problem?
Replies: 7
Views: 1796

Re: undocumented UART Hardware problem?

The problem has been observed on both UART1 and UART2. It has not been tested on UART0.


How can I be sure to have memory barriers between reads when writing in C code?"
by kbaud1
Fri May 08, 2020 5:39 am
Forum: General Discussion
Topic: What would you like to see in The Next Chip?
Replies: 382
Views: 172837

Re: What would you like to see in The Next Chip?

The ESP target low cost embedded systems. IOT. They don't need to run Linux and do everything. That would make them too expensive. The bones of the ESP32 are pretty solid. I suggest focusing on the software and only make small changes to the hardware. - boot from network (flash chip optional. ssid/p...
by kbaud1
Mon May 04, 2020 11:43 pm
Forum: General Discussion
Topic: undocumented UART Hardware problem?
Replies: 7
Views: 1796

undocumented UART Hardware problem?

We ran into a problem with the UART hardware that doesn't seem documented. In our testing this problem only appears when we also use wifi, but we think it might just be triggered by multitasking in general, not necessarily wifi specifically. The problem is that sometimes when we read the FIFO, its h...
by kbaud1
Mon Mar 23, 2020 3:32 pm
Forum: General Discussion
Topic: Reading the UART
Replies: 3
Views: 1184

Reading the UART

I ran into a problem today with the ESP32 that had me pulling out my hair for quite some hours. I ended up devising the following test program in trying to trace it: void app_main() { // Config 2 UARTs uart_config_t uart_config = {1020833, UART_DATA_8_BITS, UART_PARITY_DISABLE, UART_STOP_BITS_1, UAR...
by kbaud1
Fri Feb 07, 2020 4:57 pm
Forum: General Discussion
Topic: what is the purpose of the factory AP ("ESP_6C8A79")
Replies: 5
Views: 1821

Re: what is the purpose of the factory AP ("ESP_6C8A79")

Why is there a lack of applications using the new S2 even though the code base and much of the hardware is the same? Apparently, a built-in USB interface is just not as important as the hardware it replaced? What if the factory code that is already loaded on the ESP32 came with practical OTA (Simple...

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