Schaltplan kontrolle

Hi,

sieht ganz nett aus.

Beim JTAG müsste ich jetzt nachgucken.
Aber bei den I2C-Leitungen musst du noch Pull-Up-Widerstände dran 
machen, falls du sie nicht extern hast.
Beim UART weiß ich, dass die Pins 5V kompatible sein sollten - mach 
trotzdem 1kOhm in die RX-Leitung. Solltest du wirklich von nem RS232 vom 
PC kommen brauchst du noch nen Umsetzer zB MAX232.

Gruß (:

Stefan ⛄ F. schrieb:
> Spendiere dem ESP Modul noch einen 100µF oder 220µF Elko direkt an
> seinen Stromversorguns-Pins.
>
> Beim ESP8266 müssen einige Pins beim Reset bestimmte Pegel haben damit
> er startet. Ich vermute, das es beim ESP32 ähnlich ist. Hast du das
> bedacht?

Unterschreibe ich so - habe ich auch nicht drauf geschaut.

GPIO0

The ESP32 will enter the serial bootloader when GPIO0 is held low on 
reset. Otherwise it will run the program in flash.
GPIO0 Input   Mode
Low/GND   ROM serial bootloader for esptool.py
High/VCC   Normal execution mode

GPIO0 has an internal pullup resistor, so if it is left unconnected then 
it will pull high.

Many boards use a button marked "Flash" (or "BOOT" on some Espressif 
development boards) that pulls GPIO0 low when pressed.
GPIO2

GPIO2 must also be either left unconnected/floating, or driven Low, in 
order to enter the serial bootloader.

In normal boot mode (GPIO0 high), GPIO2 is ignored.
Other Pins

As well as GPIO0 and GPIO2, the following pins influence the serial 
bootloader mode:
GPIO   Meaning
12 (MTDI)   If driven High, flash voltage (VDD_SDIO) is 1.8V not default 
3.3V. Has internal pull-down, so unconnected = Low = 3.3V. May prevent 
flashing and/or booting if 3.3V flash is used and this pin is pulled 
high, causing the flash to brownout. See the ESP32 datasheet for more 
details.
15 (MTDO)   If driven Low, silences boot messages printed by the ROM 
bootloader. Has an internal pull-up, so unconnected = High = normal 
output.
Automatic bootloader

esptool.py can automatically enter the bootloader on many boards by 
using the RTS and DTR modem status lines to toggle GPIO0 and EN 
automatically.

Make the following connections for esptool.py to automatically enter the 
bootloader:
ESP32 Pin   Serial Pin
EN              RTS
GPIO0           DTR

Note that some serial terminal programs (not esptool.py) will assert 
both RTS and DTR when opening the serial port, pulling them low together 
and holding the ESP32 in reset. If RTS is wired directly to EN then 
RTS/CTS "hardware flow control" needs to be disabled in the serial 
program to avoid this.

Development boards (including all Espressif boards) usually use 
additional circuitry to avoid this problem - if both RTS and DTR are 
both asserted together, this doesn't reset the chip. Consult Espressif 
development board schematics for the specific details.

(Some third party ESP32 development boards use an automatic reset 
circuit for EN & GPIO pins, but don't add a capacitor on the EN pin. 
This results in unreliable automatic reset, especially on Windows. 
Adding a 100nF (or higher) value capacitor between EN pin and GND may 
make automatic reset more reliable..)

mehr habe ich auch erstmal nicht gefunden.
Grüüßee (: