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I am working with an Arduino Uno clone that uses the CH340G USB to TTL converter in lieu of the 16U2 found on the Uno. I see that most tutorials suggest downloading the CH340G drivers from what the...
With an Arduino-like board using a CH340 USB Serial chip, I'd like to send text lines as fast as possible to a Raspberry Pi through USB using the Serial.println() function. The problem is that when...
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There is no storage on the CH340 and family of UARTs where you could put a unique ID. This is also a problem for the PL2303 type. I have been trying to find solutions for this problem. First and easiest is the position of the device on the USB bus. It will be unique for each device.
The top one is a real NodeMCU version 1 board (ESP-12E module). The bottom one is a knock-off copy - looks like the same module on it.
These tricks seem to be FTDI specific. When the above debug message appears, these tricks are not used. Thus your performance may be significantly worse than with an FTDI chip. Also one of the repos has an open issue about problems with the CH340, which states, that it just doesn't work correctly. It was updated in May and still has no solution.
The CH340 is a Chinese knock-off of FTDI chips. That doesn't mean they are bad or that their drivers are unsafe. It's just what it is. FTDI, on their own, is trying also to "fix" their own drivers to not necessarily work well with CH340 chips. So you may be stuck with their drivers, like it or not.
The bulk of the ESP-01 goes on the side of the header pointed to by the arrow, covering the CH340 board, as shown below. Information on the WCH CH340 product set including the G model is here . There is plenty of online information on getting started with the ESP8266 ESP-01 using the Arduino IDE.
The CH340 is a fixed serial-port device; this cannot be changed in software. – CL. Commented Mar 31, ...
I want to use the 3.3v on a cheap Arduino Nano clone as my ADC analog reference voltage. The 3.3v comes from a regulator inside the CH340 USB serial chip. I've measured the voltages (My DMM is NOT calibrated) on seven different Nanos and the voltages vary (2.96-3.38v).