Reddit reviews Armorview PL2303HX USB to TTL to UART COM Cable Module Converter

Heh, I already have http://www.amazon.com/gp/product/B008AGDTA4/

Problem is I already modded it to have another USB male plug on the serial end. Made for some easy serial debugging on things I could add a USB port to manually (Just wired up the colors accordingly)

If I was desperate, I would A team it and butcher a USB cable and with some cello tape to make the stick headers, you could do it! ;)

If you're going to mess around with your PI a lot, one of these might be worth having around https://www.amazon.co.uk/gp/product/B008AGDTA4/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

This is what I bought:

https://www.amazon.com/Armorview-PL2303HX-RS232-Module-Converter/dp/B008AGDTA4/ref=sr_1_1?ie=UTF8&qid=1478888556&sr=8-1&keywords=uart+cable


Then you can use this guide. With that UART cable, you just hook up the green, white and black wires (the red isn't needed)

https://servernetworktech.com/2016/02/pwning-the-meraki-mr18/

If holding 's' doesn't get you a root shell (you keep getting UNAUTHORIZED ACCESS messages), you might need to do this step first:

http://imgur.com/a/bTnOw
from here:
https://servernetworktech.com/2016/02/pwning-the-meraki-mr18/

PL2303HX USB To TTL To UART RS232 COM Cable Module Converter by Generic

http://www.amazon.com/dp/B008AGDTA4/ref=cm_sw_r_udp_awd_ID1qtb1EY7GT6


Ebay has them a dollar cheaper

> Which board type do you have?

Here is what I bought: http://www.amazon.com/gp/product/B00O34AGSU/

> How are you powering the ESP board?

Well now I feel like an idiot. I knew from reading that the chip required 3.3V, and the cable I have (http://www.amazon.com/gp/product/B008AGDTA4/) outputs 5.5V. I was reading through the comments on Amazon for a wiring diagram and someone just said to leave the 5.5V wire disconnected. So I did. And then when I plugged it in, the LED's worked, so I figured it must be drawing power through the RX or TX wire. I'm thinking this is my problem.

> Have you wired up anything to any of the other ESP pins

Nothing else wired up.

Playing around with this more, I got the Stratux to operate using the GPIO serial port and a USB to TTL-UART cable (https://www.amazon.com/gp/product/B008AGDTA4)


I had to use a power USB hub though, and the TTL-UART cable powers the Stratux from that.

I have the UART connection soldered in so it lets me look through the directories and backup saves if I needed to. It's pretty easy to solder in a UART connection as the pads are decently sized and then I just use a UART to USB cable and Putty to connect.

You could retrieve your saves by compiling Madmonkey's latest hakchi build which has a NAND dump feature.

https://github.com/madmonkey1907/hakchi

Hmmm. So I put a resistor between the two lines? As in, one side plugs into A and the other into B?

Unfortunately I do not have an oscilloscope, and am hoping to not buy one :)

Yesterday I tried to simply hook the data A line and the data B line into the Bus Pirate to monitor the signals. It looked like the lines were sending almost the exact same data, but there were definitely some differences mixed it... is this normal? (I'm completely new to differential serial, I"ve only done I2C and SPI, both of which had a clock). I have a transceiver arriving tomorrow... will the transceiver turning the 2 signals into a true UART signal make it any more discernable (as far as finding start and stop bits and reading what's in between).

Also, I made a mistake in getting the bus pirate, unfortunately, as it can only sample ~.5 seconds worth of data. If the data lines are truly constantly sending data, I'm going to need much longer than that.

Lastly, I found I have this device, which came with my Pi:
http://www.amazon.com/PL2303HX-RS232-Cable-module-Converter/dp/B008AGDTA4/ref=cm_cr_pr_product_top

Could I plug the Rx/Tx lines into the Tx/Rx lines of the transceiver, then just monitor it on my computer with that USB device?

PS: I'm a bit confused about the difference between Rx/Tx. In UART They use two wires, one for each. RS485 has both devices sending/receiving on both wires? What exactly should the difference between the wires be, in that case? Should they be the same signals, and just doubled for redundancy?

Sorry, I wasn't very clear in my previous qustion. I want to be able to connect the teensy to another device that has a UART debug header (router, smart tv, embedded linux system, etc.) and use the Teensy as a serial interface with my computer. Like this adapter. Will I need a RS232 chip in order to interface with a UART debug header? Or can I use the UARTs on the Teensy itself without additional hardware?