MobileRead Forums - View Single Post - PW3 I plug my kindle serial to adapter, nothing shows up.

hanakomisa · 03-15-2023, 02:22 PM

If it is a red board, mini USB connected FT232RL adapter (looks like this), you need a 1.8v regulator such as an AMS1117 1.8 to tune down the 3.3v signal to 1.8, you connect the right leg of AMS1117 to 3.3v, then the middle leg to VCC of the serial adapter's board. Left leg is to connect it to ground.

Once that's done, you'll have a 1.8v signal for RX/TX, and only then you connect those to the Kindle. It might be a little too late for your PW3 though assuming you sent 3.3v signal through it, possibly killing the serial interface.

03-15-2023, 02:22 PM	#13
hanakomisa Neon, she/her Posts: 41 Karma: 5000 Join Date: Jul 2022 Location: Hesse, Germany Device: PW2, Tolino Vision 5	If it is a red board, mini USB connected FT232RL adapter (looks like this), you need a 1.8v regulator such as an AMS1117 1.8 to tune down the 3.3v signal to 1.8, you connect the right leg of AMS1117 to 3.3v, then the middle leg to VCC of the serial adapter's board. Left leg is to connect it to ground. Once that's done, you'll have a 1.8v signal for RX/TX, and only then you connect those to the Kindle. It might be a little too late for your PW3 though assuming you sent 3.3v signal through it, possibly killing the serial interface. Last edited by hanakomisa; 03-15-2023 at 02:23 PM. Reason: Adding an image of the serial adapter that I was referring to.