Search found 15 matches

by martinius96
Thu Oct 01, 2020 12:43 pm
Forum: Sample Code
Topic: OPC-UA Web service - ESP32
Replies: 3
Views: 8847

Re: OPC-UA Web service - ESP32

Hi, yes, i have Web OPC-UA server and clients running with following platforms: Arduino + Ethernet Wiznet W5100 Arduino + Ethernet Wiznet W5500 ESP8266 (Generic / NodeMCU / Wemos D1 Mini) ESP32 Unfortunately I am not interested to publish source codes of these (some examples are there), because it l...
by martinius96
Sat Aug 15, 2020 11:02 pm
Forum: ESP32 Arduino
Topic: Working With Wifi and BLE (Problem)
Replies: 3
Views: 519

Re: Working With Wifi and BLE (Problem)

You can NOT use WiFi and Bluetooth in same time. You have only one 2,4 GHz antenna onboard. When you want to use WiFi, you need to stop Bluetooth and vice versa. In your case, do it like: each XY milliseconds, disable bluetooth, start WiFi, send datas to Firebase, disable WiFi. When program is not ...
by martinius96
Wed Jul 15, 2020 1:38 am
Forum: ESP32 Arduino
Topic: WiFiClientSecure Memory allocation failed
Replies: 3
Views: 518

Re: WiFiClientSecure Memory allocation failed

Without code, ESP Arduino Core version, used board... We are unable to help
by martinius96
Mon May 25, 2020 4:46 pm
Forum: ESP32 Arduino
Topic: Unable to upload image (without gray strip) more than 640x480px to Google Drive - ESP-CAM via HTTP POST base64 payload
Replies: 1
Views: 678

Unable to upload image (without gray strip) more than 640x480px to Google Drive - ESP-CAM via HTTP POST base64 payload

I am solving such a problem for the ESP-CAM platform ... I have ESP-CAM, which is a microcontroller with an OV2640 camera. I am sending the photo via HTTPS POST request to Google App Script that save it to my Google Drive. Payload photo is base64 format. The photo is uploaded and fully visible. Proj...
by martinius96
Thu Apr 23, 2020 9:13 pm
Forum: Sample Code
Topic: MQTT & MQTTS - Sample implementation for ESP32
Replies: 0
Views: 2537

MQTT & MQTTS - Sample implementation for ESP32

Hello, today I would like to show you sample implementations for connection and Publish / Subscribe to MQTT Broker. Example is using public MQTT Broker located in Slovakia - use only for development (not my Broker)... Everyone can see / modify your datas there. MQTT Broker details: http://imag.secto...
by martinius96
Fri Dec 27, 2019 8:18 pm
Forum: ESP32 Arduino
Topic: ESP32 as WiFi access point crashes on connection
Replies: 3
Views: 1825

Re: ESP32 as WiFi access point crashes on connection

Show your whole code please.
by martinius96
Fri Dec 27, 2019 7:39 pm
Forum: ESP32 Arduino
Topic: Soft AP ESP32 & multiple clients
Replies: 6
Views: 2291

Re: Soft AP ESP32 & multiple clients

Without Async library for webserver you cannot get IP address of client. So in that case you can use 2 webpages on Webserver and one client will use first page, other will use second page. Or you will connect to same page with both clients, also... One client must end its connection... (You havent e...
by martinius96
Thu Dec 26, 2019 10:06 pm
Forum: ESP32 Arduino
Topic: Soft AP ESP32 & multiple clients
Replies: 6
Views: 2291

Re: Soft AP ESP32 & multiple clients

E-mail me: martinius96@gmail.com
I can help you.
by martinius96
Thu Dec 26, 2019 8:44 pm
Forum: Sample Code
Topic: OPC-UA Web service - ESP32
Replies: 3
Views: 8847

OPC-UA Web service - ESP32

OPC UA architecture has been operating since 2008. Today I would like to write something about my implementation in Arduino core of a simple sensor network based on OPC UA architecture. The implementation includes standard client --> server communication, using various types of clients to send and r...

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