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interfaces:cp2102 [2017/03/16 01:13] – [CJMCU cp2102 modules (not pictured yet)] darroninterfaces:cp2102 [2020/08/22 06:07] (current) – [Linux] darron
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 This is a high speed USB UART and a genuine item should easily attain 460800 baud in Linux or even higher. This is a high speed USB UART and a genuine item should easily attain 460800 baud in Linux or even higher.
  
-=== BAITE Cp2102 module (pictured) ===+=== BAITE module (pictured) ===
  
 Transmit is labelled RXD and receive as TXD on this module. Transmit is labelled RXD and receive as TXD on this module.
  
-The device appears to be a genuine cp2102.+=== CJMCU module ===
  
-=== CJMCU cp2102 module (not pictured yet) ===+This module uses a cp2102 device incorrectly wired with 
 +4v4 on their output pins instead of 3v3. This module is totally 
 +unreliable at 460800 baud.
  
-This module appears to use a fake cp2102 device and rather +A source on the web explains that the RESET pin is incorrectly 
-than the the chip VREG being 3V3 these boards output 4.3V +pulled high to VUSB. 
-or 4.4V on their output pins.+ 
 +=== 6 in 1 USB to TTL RS232 USB TTL to RS485 === 
 + 
 +There is lot going on here and none has been tested. A diagram exists 
 +explaining the switches. 
 + 
 +{{:interfaces:6in1.jpg?400}} 
 + 
 +<code> 
 +Mode Pin Function 
 +TTL Level Interface TXD TTL Transmit 
 +TTL Level Interface RXD TTL Receive 
 +TTL Level Interface GND TTL ground 
 +232 Level Interface 232-TX 232 Transmit 
 +232 Level Interface 232-RX 232 Receive 
 +232 Level Interface GND 232 Ground 
 +485 Level Interface A 485A+ 
 +485 Level Interface B 485B- 
 ++5V Voltage Output +5V +5V Voltage Output 
 +3.3 Voltage Output 3V3 3.3V Voltage Output 
 +DTR Output DTR Special Function 
 +RTS Output RTS Special Function 
 +</code>
  
 === Linux === === Linux ===
  
 == udev /dev/ttyCP2102 == == udev /dev/ttyCP2102 ==
 +
 <code> <code>
 KERNEL=="ttyUSB*",\ KERNEL=="ttyUSB*",\
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 == udev by-id == == udev by-id ==
 +
 <code> <code>
 /dev/serial/by-id/usb-Silicon_Labs_CP2102_USB_to_UART_Bridge_Controller_0001-if00-port0 /dev/serial/by-id/usb-Silicon_Labs_CP2102_USB_to_UART_Bridge_Controller_0001-if00-port0
 </code> </code>
-udev by-id is not supported by Pickle Microchip PIC ICSP. +
  
 === Pickle Microchip PIC ICSP === === Pickle Microchip PIC ICSP ===
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 == Configuration == == Configuration ==
 <code> <code>
-DEVICE=/dev/ttyUSB0+DEVICE=TTY 
 +IFACE=/dev/ttyUSB0
 SLEEP=0 SLEEP=0
 BITRULES=0x001F BITRULES=0x001F