you can use a line buffer like SN74AHC125D tied to the EN via a voltage supervisor like MAX810TTRG

This is the code that I am running. I put a scope on IO0 and I get the attached signal. the same program on another pin works like a charm. void task_i2cscanner(void *ignore) { vTaskDelay(1000 / portTICK_PERIOD_MS); ESP_LOGD("Sensor", ">> i2cScanner"); i2c_config_t conf; conf.mode = I2C_MODE_MASTER;...

there are not enough pins on esp32. I am already using port expanders, multiple multiplexers on that pcb. I need to make them work :) I will look with my trusted rigol. I was trying to determine if there is something internal that prohibits them to be used as i2c. they have internal pullups, they ar...

the certificate chain that validates your server certificate. Most likely the root certificate from lets encrypt + any intermediate used to singe it. look at https://stackoverflow.com/questions/25482199/verify-a-certificate-chain-using-openssl-verify you dont need to embed the certifcate from your s...

Hi,
I know how they function, nevertheless in the esp32 docs they say that after boot they behave like normal pins. I do use them for the boot process but it doesnt seem to be working, while the same software when its using other pins is working

I am trying to use IO0 for SDA and IO4 for SCL in I2C. I have tried with 4.7k external pullups in both pins and no pullups as well. I2cscanners fail to connect to sensors. When I am using other pins everything works fine. Any ideas?

Hi, I am trying to use sensor_vn and sensor_vp as input, with values coming from an adc chip (which uses data and clock pins). I haven't added any pullup or pull down resistors. looking through the forum I have found and implemented this code. I am aware the bug about gpio39 firing where some periph...

I have some requirements that narrow down my selection of input methods to use. a. device must be able to recognize barcodes on a curved surface (like a bottle) b. bottles will be on a conveyor belt c. low light environment. no external light permitted. d. there may be people looking into the device...

Hi,
Is it feasible to have a barcode reader device based on esp32? is there a barcode decode library that I can compile ? any ideas or suggestions?

I would like to truncate a file in spiffs. I have found in vfs and in fatbut I am not sure I have to to use and how