Search found 90 matches

by idahowalker
Tue Apr 09, 2019 7:17 pm
Forum: ESP32 Arduino
Topic: Any ESP-Arduino documentation?
Replies: 1
Views: 208

Re: Any ESP-Arduino documentation?

Internet search on "installing esp32 in arduino ide" does not give you any results?
by idahowalker
Fri Apr 05, 2019 11:28 am
Forum: ESP32 Arduino
Topic: Questions about Pull-up/Pull-down and PWM
Replies: 1
Views: 80

Re: Questions about Pull-up/Pull-down and PWM

I think your idea of using a pull up resistor at the higher frequencies is a sound idea. I'd use external resistors over the internal resistors though. In this case size matters. The resistors in the ESP32 are quite small and tiny and weak in comparison to a 1/8th or 1/4 watt resistor.
by idahowalker
Thu Apr 04, 2019 5:47 pm
Forum: ESP32 Arduino
Topic: MPU9250, good news:
Replies: 0
Views: 92

MPU9250, good news:

I wrote this code for the MPU9250. I been testing it for the last 4 days. It's been working wonderfully. Thanks to Koolban, though he does need to update the SPI portion of his notes. Some names have been changed. #include <driver/spi_master.h> #include "esp_system.h" //This inclusion configures the...
by idahowalker
Thu Apr 04, 2019 2:23 am
Forum: Hardware
Topic: Driving an 8-bit parallel 8080 bus using I2S
Replies: 18
Views: 1692

Re: Driving an 8-bit parallel 8080 bus using I2S

LCD1602 2004 20x4 LCD Display Adapter IIC//TWI/SPI/I2C Serial Interface Module Shield https://smile.amazon.com/gp/product/B07D3YPK3H/ref=oh_aui_search_asin_title?ie=UTF8&psc=1 . You might have to do some of your own code or the library might work. I use them to drive LCD's with a Arduino Due and a S...
by idahowalker
Wed Apr 03, 2019 3:55 pm
Forum: ESP32 Arduino
Topic: Continuous reboot on WiFi and Bluetooth
Replies: 6
Views: 333

Re: Continuous reboot on WiFi and Bluetooth

pravi.khm@gmail.com wrote:
Wed Apr 03, 2019 6:04 am
adafruit
The magic word. I find many, not all, Adafruit libraries will cause the ESP32 to fault in some form or fashion.
Have you tried disabling all libraries and then one at a time, reenable each library one at a time to find the fault. I'd start with Adafruit first.
by idahowalker
Tue Apr 02, 2019 7:41 pm
Forum: ESP32 Arduino
Topic: A fatal error occurred: Failed to connect to ESP32: Timed out waiting for packet header
Replies: 9
Views: 443

Re: A fatal error occurred: Failed to connect to ESP32: Timed out waiting for packet header

You're saying that I can harm the PC if I connect the ESP directly to it via a USB Cable ? I never thought of that. I have experienced the 5V regulator supplying the ESP32 5V, deciding to put out a higher voltage, than 5V. If you look at the ESP32 schematic, you'll see that the 5V from the USB plug...
by idahowalker
Tue Apr 02, 2019 12:01 pm
Forum: ESP32 Arduino
Topic: A fatal error occurred: Failed to connect to ESP32: Timed out waiting for packet header
Replies: 9
Views: 443

Re: A fatal error occurred: Failed to connect to ESP32: Timed out waiting for packet header

Have you tried holding down the EN button during sketch upload? I found some but not all ESP's require the EN button to be held down before and until the upload has started. That is till, I added a powered USB hub. Once I added in a powered USB hub the need for sometimes holding down the EN button d...
by idahowalker
Tue Apr 02, 2019 2:43 am
Forum: ESP32 Arduino
Topic: Continuous reboot on WiFi and Bluetooth
Replies: 6
Views: 333

Re: Continuous reboot on WiFi and Bluetooth

How does the ESP behave when a blank sketch is uploaded?

It might be time to logically eliminate lines of code till the issue goes away and then add them back, logically, till the issue returns.
by idahowalker
Tue Apr 02, 2019 2:40 am
Forum: ESP32 Arduino
Topic: Upload doesn't work anymore ! ESP too hot to touch ! Is it broken ?
Replies: 6
Views: 317

Re: Upload doesn't work anymore ! ESP too hot to touch ! Is it broken ?

My guess is that the ESP32 is dead. How, I've no idea.

I had a collection of 7805's that would last a day or two then do some whacked out cht. I found ESP32's blow as quick as fuses. Since then I keep 1 ESP32 and one WROVER-B around as a spare.
by idahowalker
Fri Mar 29, 2019 9:42 pm
Forum: Hardware
Topic: How to Reset slave devices
Replies: 1
Views: 134

Re: How to Reset slave devices

I have one ESP32 WROVER-B connected to 2 ESP32's. Power to the ESP32's is supplied through two 3.3V relays. The default state for the relays is off. The WROVER B powers the two ESP32's and their related circuits 400mS, after the WROVER-B has powered on. Once a second, over a CAN buss, the 2 ESP32's ...

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