Reddit reviews WITMOTION USB-UART 6-in-1 Multifunctional(USB-TTL/RS485/232,TTL-RS232/485,232 to 485) Serial Adapter, with CP2102 Module Compatible with Windows 7,8,Linux,Arduino, for develeopment Projects
We found 3 Reddit comments about WITMOTION USB-UART 6-in-1 Multifunctional(USB-TTL/RS485/232,TTL-RS232/485,232 to 485) Serial Adapter, with CP2102 Module Compatible with Windows 7,8,Linux,Arduino, for develeopment Projects. Here are the top ones, ranked by their Reddit score.
Six-in-one Multifunctional Serial adater supports usb-ttl, usb-rs232, usb-rs485, ttl-232, ttl-485, 232-485 converting function, freely convert to each otherUSB specification 2.0 is compatible with Windows XP/7/8/10 32bits/ 64bits, Linux, Wince, Mac, Vista etc.Equipped with superior-quality mode switch(endurable), status indicating LED(easy to connect), upgraded TO5 fuse (excellent protection), imported chipset CP2102 (stable and reliable), Baud rates: 300 bps to 1.5 Mbps. BUY WITH CONFIRDENCE: R&D by WitMotion Team( 6-year Professional Attitude Measuring Solution Provider), Lifetime Technical Support:(Email: [email protected], Mob/Whatsapp: +86 13652339539)What you get: 1 x WitMotion Six-in-one serial adapter module + 4 x Dupont lines +1 x instructions card, packed by antistatic bag.
The waveshare ESP32 board is a good open source reference you can use: https://www.waveshare.com/w/upload/8/80/E-Paper_ESP32_Driver_Board_Schematic.pdf (I'm guessing you already did based on similarities).
If you don't need the extra accuracy, you can recover 2 gpios by dropping the external crystal. I'm not sure it's that well supported (at least in Arduino) and if you need an accurate clock, you can add a cheap I2C RTC which can share the I2C bus with other sensors. Speaking of sensors, most sensors are available in an I2C version which don't use any additional pins.
I usually also leave off the USB-serial converter and just put a 2x3 header breaking out TX/RX/DTR/RTS/3V/GND. I have a cable I made up that goes from my usb-serial converter (this one) to the onboard header.
Keep in mind that some of the pins are input only, looking at the names on the schematic, I think you took that into account, but verify.
You use really high resistor values in the battery measurement circuit, I know there is an upward limit beyond which the ADC won't work reliably. Since it looks like you are trying to turn on/off the resistor divider, you can use lower resistances. Check out these references (one, two). I used something like Nick's answer to this SE question in my own design. If you're doing a rechargable battery, you should really consider a lipo fuel gauge IC instead though. It'll give you a much better indication of battery charge than voltage alone.
I have a Stratux built with a Raspberry Pi 3. I have flashed it with version v1.4r5 (991f48eaa5).
I am trying to get the serial connection working so I can interface it with my GRT HX.
I purchased this dongle: USB TTL 232 485 converter serial module from Amazon.$ 9.90📷
USB TTL 232 485 converter serial module
Product document: https://wiki.wit-motion.com/english 1.USB to TTL 232 485 Serial Converter. 2.USB TTL 232 485 c...I have booted the Stratux with the switches on the card in every combination. At no time do I get a window in the settings page that allows me to enter baud rate. I get the impression the Stratux software is not seeing the dongle, or might not have the drivers for it.
I attached a keyboard and monitor (hdmi) the the Pi and logged in. I ran the command to list all USB devices and it is there.
The USB light is on on the dongle. However, I have not seen the TX light ever.
I have connected the 232T pin and the GND to the GRT unit. I have tried every baud rate available for the GRT, but have never seen a packet received.
I have little to no experience with Linux.
I would appreciate any help.
I have pictures, but am new to Reddit and haven't figured out how to include them.
​
There are multiple options on Amazon, search CP2102 RS232. Not a lot of prebuilt cables though, you may have to solder or crimp it yourself, it's just 2 wires so an easy job. I built stratux into a case for mounting behind the panel, and brought the power, screen, and serial out connections to a DB15 connector on the side, so I just used a small converter similar in form factor to the SDRs:
USB TTL 232 485 converter serial module https://www.amazon.com/dp/B01CNW061U
Be sure as you're picking modules that the output levels are correct for the device you're connnecting -- some of the modules only convert to TTL which may not work with your device's serial port.