Search found 64 matches

by rin67630
Sat Jun 09, 2018 7:54 am
Forum: ESP32 Arduino
Topic: ESP32 DAC1 and DAC2 not synchronous on Arduino IDE
Replies: 5
Views: 1348

Re: ESP32 DAC1 and DAC2 not synchronous on Arduino IDE

How about dual core?? While I'm waiting for the MCP4802 I was playng with the dual core!!! The idea is to synchronize the call of dac_output_voltage(DAC_CHANNEL_x, a-b), one for each core. Mauro Remember: the second core is not idling uselessly, it provides WiFi+Bluettoth and needs some prime time ...
by rin67630
Wed Jun 06, 2018 1:07 pm
Forum: Hardware
Topic: RTC clock too fast by 2 Min in 10 hours?
Replies: 5
Views: 2776

Re: RTC clock too fast by 2 Min in 10 hours?

My problem is very similar to yours. I'm also doing light sleep and seeing very large and unpredictable time drifts (around +3-10ms/s). I'm also using a WROOM 32 rev1. Were you able to get better results from RTC by adding the 32kHz crystal to GPIO32 and 33? Thanks! That was too much fiddling. I ha...
by rin67630
Wed Jun 06, 2018 1:01 pm
Forum: ESP32 Arduino
Topic: is it possible to work with 2 setup() functions and 2 loop() within the ESP32-Arduino enviroment
Replies: 10
Views: 2587

Re: is it possible to work with 2 setup() functions and 2 loop() within the ESP32-Arduino enviroment

YvesDS wrote:Hi all,
...and be more than welcome, since at this moment we only use one core at a time within the ESP-Arduino, and if both cores are used, it is not dedicated witch one would be used for what part of the code, not?
Remember: the second core is not idling, it provides WiFi+Bluettoth.
by rin67630
Wed Jun 06, 2018 12:58 pm
Forum: ESP32 Arduino
Topic: is it possible to work with 2 setup() functions and 2 loop() within the ESP32-Arduino enviroment
Replies: 10
Views: 2587

Re: is it possible to work with 2 setup() functions and 2 loop() within the ESP32-Arduino enviroment

I can remember that Andreas Spiess has issued a video about that.
But remember the second core must provide Wifi+Bluetooth fuctionality, so it is to be used with care.
Anyhow you have to use freeRTOS and manage the cooperation with the base code to evoid jeopardizing the core functionality.
by rin67630
Fri May 25, 2018 8:27 am
Forum: ESP32 Arduino
Topic: Analog inputs from ESP32 more than random generators?
Replies: 3
Views: 3333

Re: Analog inputs from ESP32 more than random generators?

Thank you. It helped to put a 22nF condensator to the the two adjacent analog inputs.
by rin67630
Thu May 24, 2018 9:18 pm
Forum: ESP32 Arduino
Topic: Analog inputs from ESP32 more than random generators?
Replies: 3
Views: 3333

Analog inputs from ESP32 more than random generators?

I am very disappointed. I have entered an absolutely stable voltage of 557,3 mV (verified with my 5 digits multimeter and absolutely clean according to my oscilloscope) on pin 37 of an ESP32 Wroom. Here is my code: Setup: ... analogReadResolution(10); // 10Bit resolution analogSetAttenuation(ADC_0db...
by rin67630
Fri May 11, 2018 7:47 pm
Forum: General Discussion
Topic: Security concerns, which risk without OTA?
Replies: 4
Views: 1192

Re: Security concerns, which risk without OTA?

If you don't have the device doing OTA then it's probably pretty secure. But who knows if there are any backdoors lurking around. Yes that was my concern. The device contains the WLAN password unencrypted, can one imagine to retrieve it remotely? I am only concerned by WLAN/LAN attacks , not by any...
by rin67630
Fri May 11, 2018 4:50 pm
Forum: General Discussion
Topic: Security concerns, which risk without OTA?
Replies: 4
Views: 1192

Security concerns, which risk without OTA?

OK, it's clear that with the ability to change code over the air, the potential risk of being hijacked raises enormously.
But, as long as no OTA code is uploaded and the device is not on USB, will i have to care for security as long as no physical access to the device is given?
by rin67630
Sun May 06, 2018 8:47 am
Forum: ESP32 Arduino
Topic: Wemos Lolin 32 geting hardware SPI to work
Replies: 1
Views: 1475

Wemos Lolin 32 geting hardware SPI to work

Hi may I ask for a clue? I have wired a TFT display to my Wemos Lolin32. It works, but apparently only with software SPI. Here is my code for the ( Arduino IDE ) #define TFT_DC 2 //Data/Cmd #define TFT_CS 15 //Chip Select #define TFT_MOSI 23 //Master out Slave in #define TFT_CLK 18 //System Clock #d...
by rin67630
Fri Apr 20, 2018 1:57 pm
Forum: General Discussion
Topic: Easy library to upload an array as a file to a FTP server?
Replies: 0
Views: 508

Easy library to upload an array as a file to a FTP server?

Can someone recommend an easy library to upload an array as a file to a FTP server?
Most of the libraries do expect a file in a filesystem.

I have only an array containing the data and would avoid to manage a file system just to upload.


Wifi is running and the connection is done.

Thank you

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