Just use a timer interrupt

That's what I ended up on doing, Only issue is I need three of these triggering at different times (with an interrupt triggering the respective timer and switching the others off)

Although this code works perfectly to start the timer:

gpio_set_level(32, 0);
gpio ...

Hi WiFive,

This was the other option I was thinking of doing.

I was hoping that maybe the ledc module could do this.

I'd say if the timer has a period of 20 mins with a 10% duty, then a variation of 5% or less would be preferred.

I'm not too familiar with the esp32's timers. How would I go about ...

Hey everyone,

I'm starting to dig around and have been fooling with the ledc module, but I don't think it will fulfill my requirements completely. I need to generate a very slow pwm signal, somewhere in the order of having a period of 10 to 20 minutes. The duty will be fixed

Is there anyone I can ...

Hey everyone,

In my code upon wake up I want to have the esp retrieve time using sntp. The sync works perfectly the first time as it updates from 1970 to 2019, althought I have no idea what to make the condition for subsequent sync's to allow it to resync.

time_t now = 0;
struct tm timeinfo ...

HI Ritesh Prajapati,

Sorry I completely forgot to reply and have still not gotten this working.

Here's the output of the core dump:
python ~/esp/esp-idf/components/espcoredump/espcoredump.py info_corefile -d 3 -t b64 -c ~/Desktop/dump1.txt ~/Desktop/esp-idf-template/build/app-template.elf ...

Hey everyone,

I've got my SPI init code defined as the following:

#define GPIO_MOSI 21
#define GPIO_MISO 14
#define GPIO_SCLK 12
#define GPIO_CS 22

ESP_LOGI(TAG1,"Started master SPI");
esp_err_t ret;
spi_device_handle_t handle;

//Configuration for the SPI bus
spi_bus_config_t buscfg ...

Hey everyone,

I've got my SPI init code defined as the following:

#define GPIO_MOSI 21
#define GPIO_MISO 14
#define GPIO_SCLK 12
#define GPIO_CS 22

ESP_LOGI(TAG1,"Started master SPI");
esp_err_t ret;
spi_device_handle_t handle;

//Configuration for the SPI bus
spi_bus_config_t buscfg ...

hey everyone,

For some reason the coredump utility is providing me with nearly no info.

It either just says that a brownout procured or that it couldn't access some memory region or some other random info.

I had a look at kolbans book and in it he gets the exact line at which the error ...

Can you post the contents of the panic (and if possible, the backtrace)?


Hi! Here's the coredump:

espcoredump.py v0.3-dev
INFO:Read TCB 356 bytes @ 0x3ffbb9b4
INFO:Read stack 1148 bytes @ 0x3ffbb530
INFO:Stack start_end: 0x3ffbb530 @ 0x3ffbb9ac
INFO:Read TCB 356 bytes @ 0x3ffbc88c
INFO:Read ...

Hey everyone,

I have a multi_master spi going.
When the one master takes a long time to communicate with the esp32 the device panicks.

Essentially the spi_slave transmission call is done with the following:

ret=spi_slave_transmit(HSPI_HOST, &t, portMAX_DELAY);

I know that it is this causing ...