Search found 47 matches

by rodmcm
Thu Jun 20, 2019 9:14 am
Forum: ESP32 Arduino
Topic: ESP32 I2C read issue
Replies: 1
Views: 907

Re: ESP32 I2C read issue

The sensor, if it is I2C compatible should have a singular or range of addresses that can be used to read and write to it. If you cannot find this in a manual then search for 'I2C Scanner" this program will register all of the I2C nodes connected. http://www.ti.com/lit/ds/symlink/adc121c021.pdf Inte...
by rodmcm
Mon May 20, 2019 8:51 am
Forum: ESP32 Arduino
Topic: Send data from one ESP32 to another
Replies: 6
Views: 4416

Re: Send data from one ESP32 to another

If you search this site you will find that using WIFI with Bluetooth is almost impossible due to the large compiled size of the two together. I have overcome this only by using two ESp32'a one for the WIFI connection and one for the bluetooth with a standard hardwired serial in-between There seems ...
by rodmcm
Thu May 16, 2019 12:25 am
Forum: Hardware
Topic: Switch-mode Power Supply causes ESP32 brownout
Replies: 7
Views: 3453

Re: Switch-mode Power Supply causes ESP32 brownout

I would put a big polarised capacitor on the output 220uF or so to assist with surges
by rodmcm
Thu May 16, 2019 12:21 am
Forum: Hardware
Topic: Example schematic for ESP32-WROOM?
Replies: 7
Views: 7726

Re: Example schematic for ESP32-WROOM?

Try this
by rodmcm
Mon Dec 24, 2018 8:55 am
Forum: ESP32 Arduino
Topic: Examples for many serials ports
Replies: 4
Views: 3322

Re: Examples for many serials ports

There are three hardware based serial ports (0,1,2) on the ESP32 without using hardware serial Have a look at an IO cross reference for the IO associated with each port You can use by calls such as this HardwareSerial Serial1(1); #define SERIAL1_RXPIN 25 #define SERIAL1_TXPIN 26 Serial1.begin(57600,...
by rodmcm
Mon Dec 24, 2018 8:47 am
Forum: ESP32 Arduino
Topic: WIFI AP connection crashes ESP32
Replies: 2
Views: 2373

Re: WIFI AP connection crashes ESP32

Thanks for that I was using I2C at the same time.. When I removed the I2C the problems went away.. I am convinces that ESP32 is just not a good product if you attempt to use too many features.. So I have split my program into two ESPs, one for WIFI connect and one for logic. Works only because ESP i...
by rodmcm
Mon Dec 24, 2018 8:40 am
Forum: ESP32 Arduino
Topic: HardwareSerial question
Replies: 4
Views: 5351

Re: HardwareSerial question

Serial1.setRxBufferSize(1024);
by rodmcm
Thu Dec 06, 2018 5:59 am
Forum: ESP32 Arduino
Topic: How to update ESP32 Arduino Core
Replies: 2
Views: 3583

Re: How to update ESP32 Arduino Core

There are two ways In Arduino IDE the board manager can be used to select ESP32 and update the latest 'released to Arduino" ESp32 files. These are not the latest on Github If you use the Github then this can upload the latest version In both cases the files are located in a hardware folder in your A...
by rodmcm
Mon Nov 26, 2018 4:10 am
Forum: ESP32 Arduino
Topic: WIFI AP connection crashes ESP32
Replies: 2
Views: 2373

WIFI AP connection crashes ESP32

Downloaded the latest ESP32 to Arduino IDE and found that every time my PC or phone looks for the AP connection then the ESP32 crashes. Usually this is when 'seeking IP Address"
Has anyone had issues with this new version. Any fixes?
by rodmcm
Tue Nov 20, 2018 6:57 am
Forum: ESP32 Arduino
Topic: USB alternative for debug?
Replies: 5
Views: 2838

Re: USB alternative for debug?

The USB connection actually uses TX0 and RXO so you can put another power supply on and use the USB only for logging via Serial.print etc.

You also have two other serial outputs that you can connect to a FTDI unit and look at the output with Putty or similar

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