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Uxcell a14041500ux1216 MAX232CSE Transfer Chip RS232 to TTL Converter Module COM Serial Board

3.7 3.7 out of 5 stars 44 ratings
Currently unavailable.
We don't know when or if this item will be back in stock.
Compatible Devices Television
Specific Uses For Product personal
Connector Type Serial Adapter
Color Black,Blue
Brand uxcell

About this item

  • Product Name : RS232 Serial Port To TTL Converter Module; VCC : 3V/5V
  • Total Size : 34 x 32x 14mm / 1.3" x 1.3" x 0.55"(L*W*T);Cable Length : 14cm/ 5.5"
  • External Material : PCB; Main Color : Blue, Black
  • Weight : 16g
  • Package Content : 1 xRS232 Serial Port To TTL Converter Module

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Customer reviews

3.7 out of 5 stars
3.7 out of 5
44 global ratings
Lemon?
1 Star
Lemon?
So this is not the device pictured. The device i received doesn't have CE or FCC certification stamps on the back pictured in the description which might explain why mine failed.I couldn't get mine to work, my loopback test fails and the MAXIM chip just gets real hot! Something is wired wrong or more likely the chip itself is damaged. You get what you pay for, i guess, but with all the positive reviews I am wondering if I am the only one to have this experience.
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Top reviews from the United States

TB
5.0 out of 5 stars Could use a little documentation, but seems to work as-advertised otherwise
Reviewed in the United States on July 17, 2014
Verified Purchase
Disclaimer: Just got this item an hour ago, so I may have to revise this review after using it a bit more...

In order to get this to work with an AVR Atmega1284p on a breadboard, I had to connect Rx-PC/Rx-AVR, and Tx-PC/Tx-AVR. It did not work in the conventional Rx-PC/Tx-AVR fashion. There was no documentation with the product to specify that, so perhaps I should have rated this at 4-stars instead...but once I swapped those two leads, it seems to work just fine. The whole thing didn't take more than 5-10 minutes to set up and get working.

So over all, to this point anyway, I am very happy with this product.
One person found this helpful
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Zuirch
4.0 out of 5 stars Works great; careful about pin direction
Reviewed in the United States on July 17, 2014
Verified Purchase
This is a good little device. It easily attaches to the DB9 RS-232 serial port of my computer. I haven't screwed it on, as it seemed like the screws on this wouldn't quite fit the screws on the computer's DB9 connector (I tried reversing them, but they didn't seem long enough).

The port has GND, RXD, TXD, and VCC pins (not in that order) and it comes with a ribbon cable to connect. Now, I'm used to needing to swap RX & TX between the two devices, but with this board, you probably don't need to--the RX line is actually an output, and is meant to connect to your peripheral's TX line. Similar deal for the TX line on this board--it is actually an input.

I figured this out by looking at the data sheet for the Maxim MAX3232 IC that powers this board (available here: http://datasheets.maximintegrated.com/en/ds/MAX3222-MAX3241.pdf).

Also note that the board has a VCC connection; this is a power supply connection, and the board expects to it from the device that you're communicating with.

I was able to get this to run at 9600 baud with a raspberry pi, but I wasn't using the raspberry Pi's native serial--I was using another USB board connected to the pi. (This USB device here: http://www.amazon.com/gp/product/B009T2ZR6W/ref=wms_ohs_product?ie=UTF8&psc=1). I did this so I can use the raspberry pi's native serial for other purposes.
5 people found this helpful
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Wes Modes
5.0 out of 5 stars Let's the Raspberry Pi talk RS232
Reviewed in the United States on November 29, 2013
Verified Purchase
I got this to talk to a serial device with my Raspberry Pi. Unlike most of the serial converters out there, this beast is designed to convert the RPi's TTL-level serial voltage (3.3v) to RS232-voltage (~9v). It worked like magic. I bought one, tried it, was pleasantly surprised, and bought 4 more.
5 people found this helpful
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Ben
1.0 out of 5 stars Lemon?
Reviewed in the United States on September 4, 2016
Verified Purchase
So this is not the device pictured. The device i received doesn't have CE or FCC certification stamps on the back pictured in the description which might explain why mine failed.

I couldn't get mine to work, my loopback test fails and the MAXIM chip just gets real hot! Something is wired wrong or more likely the chip itself is damaged. You get what you pay for, i guess, but with all the positive reviews I am wondering if I am the only one to have this experience.
Customer image
Ben
1.0 out of 5 stars Lemon?
Reviewed in the United States on September 4, 2016
So this is not the device pictured. The device i received doesn't have CE or FCC certification stamps on the back pictured in the description which might explain why mine failed.

I couldn't get mine to work, my loopback test fails and the MAXIM chip just gets real hot! Something is wired wrong or more likely the chip itself is damaged. You get what you pay for, i guess, but with all the positive reviews I am wondering if I am the only one to have this experience.
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6 people found this helpful
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book guru
2.0 out of 5 stars False advertising/description. The chip is not a MAX232CSE as ...
Reviewed in the United States on January 3, 2018
Verified Purchase
False advertising/description. The chip is not a MAX232CSE as they claim in the title. That means it will not output +/-10V but just approx. +/-6V. Why is it not a MAX232CSE? Because that one only works with 5V and not the 3.3V they list. Further the images shows the MAX3232.
5 people found this helpful
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Eric Peterson
3.0 out of 5 stars Did not work with my raspberry pi
Reviewed in the United States on January 5, 2014
Verified Purchase
I wasn't sure which converter to use so I bought this one and from NKC which requires soldering. I will try that one next.

This one comes with a 4 pin header with 0.1 inch spacing and corresponding cable with 4 conductors. I hooked it to the GPIO header on the raspberry: VCC to VCC, GND to GND, TX to TX and RX to RX. When I turned on the raspberry pi, this converter's power LED turned on. So far so good.

When I tried communicating with a device (a weather station serial interface) I got nothing, I am able to talk to the weather station with a USB serial adapter on a laptop.

Then I connected this converter to the laptop USB-serial interface. Still no data in either direction. I tried swapping TX and RX but still nothing.

I am using teraterm on the laptop which works fine with the weather station. I am using minicom on the raspberry. My settings are 9600 8N1 on both ends. I turned off hardware flow control on the raspberry in the minicom options menu,

It's been a long time since I've fiddled with RS-232, about 20 years ago I did some at work. I'm not sure what else to try...
One person found this helpful
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Muddy
5.0 out of 5 stars Works great!
Reviewed in the United States on March 12, 2016
Verified Purchase
This unit worked for us!
Awesome, just play a little with tx and rx, get all your serial port settings to match on both systems, and you're good to go!
Preferred method for computer to microcontroller com.
Good to 115200 baud.
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Bill
5.0 out of 5 stars Works perfectly with an ESP8266 (3.3V)
Reviewed in the United States on May 12, 2016
Verified Purchase
I have it connected to G13(Rx) and G15(Tx), using the Arduino library and Serial.swap() to remap UART0. I am reading/writing from a PC at 115200 (PuTTY through USB-RS232 COM port through cable to this board+ESP8266).
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Top reviews from other countries

VE2KI
5.0 out of 5 stars Five Stars
Reviewed in Canada on February 16, 2018
Verified Purchase
Works as described.
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David, Edinburgh
5.0 out of 5 stars Highly recommended
Reviewed in the United Kingdom on December 26, 2016
Verified Purchase
Does the job exactly as described. I used it to convert TX/RX lines from a "5V GPS" to a PC RS232 card. A direct connection showed that the received characters sent by the GPS (3.3V/0 level) were at too low a level for the RS232 card recognise, but they worked perfectly when the converter card was added. Having the ribbon cable and push-on connectors was helpful in my setup, as was the fact that pin 1 (DCD) was open circuit on the board, so could be used to send the timing signal from the GPS to the RS232 card.
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j_user
5.0 out of 5 stars Five Stars
Reviewed in Canada on December 14, 2017
Verified Purchase
works good
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Andy Aird
5.0 out of 5 stars Great item - as described,
Reviewed in the United Kingdom on April 2, 2017
Verified Purchase
Great item - as described,
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