install valetudo on Roborock S6

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I used this way to install valetudo-re on my Roborock S6, tested with 2 devices. I’m not responsible if you kill your device.

First we must gain ssh root access to the vacuum, that only works with some soldering. Then we install the new software on 2 partitions, seems to be some kind of backup concept.

preparations

USB RS232 adapter 3.3V
micro usb cable for GND connection
a roborock S6 (you don’t need a reset from the device)

At first step, you should visit https://builder.dontvacuum.me/_s6.html to start building a version from valetudo-re for you.

After a few minutes, you should receive a mail with the software

now you could start to deassemble the device, you must reach 2 testpoints under the mainboard. Have fun. 😀

TPA8 and TPA15 are RXD and TXD, I soldered 2 cables. You must remove some kind of protective paint.

on boot, press „s“ until „sunxi“ appears.

setenv boot_fs a
setenv setargs_mmc ${setargs_mmc} init=/bin/sh
boot

In the next 5 seconds:

echo 'V' > /dev/watchdog

disable iptables stuff

sed -i -e '/    iptables -I INPUT -j DROP -p tcp --dport 22/s/^/#/g' /opt/rockrobo/watchdog/rrwatchdoge.conf
sed -i -E 's/dport 22/dport 29/g' /opt/rockrobo/watchdog/WatchDoge
sed -i -E 's/dport 22/dport 29/g' /opt/rockrobo/rrlog/rrlogd

install public ssh key

chown root:root /root
chmod 700 /root
mkdir /root/.ssh
chmod 700 /root/.ssh
vi /root/.ssh/authorized_keys

now you have access with ssh

ssh -oKexAlgorithms=+diffie-hellman-group1-sha1 root@IP

maybe you should adjust the clock with

ntpdate yourntpserver

and don’t forget to set a root password!

Now you cold check the mail from the builder, we only need the tar.gz file.

move file to the device

scp -oKexAlgorithms=+diffie-hellman-group1-sha1 /tmp/roborock.vacuum.x6_2652_fw.tar.gz root@IP:/mnt/data/

install on the device

cd /mnt/data
tar xpvfz roborock.vacuum.x6_2652_fw.tar.gz
./install_b.sh
reboot

after reboot, your ssh public key is away, login with password and install on the second partition

cd /mnt/data
./install_a.sh

Now you can access your vacuum with http://IP on your browser.

Have fun!

disable Power LED and Network LED on RPI4

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To disable the Power and Network LED’s on a Raspberry 4:

change /boot/config.txt

IMPORTANT: in the [pi4] area

# Disable the PWR LED
dtparam=pwr_led_trigger=none
dtparam=pwr_led_activelow=off
# Disable the Activity LED
dtparam=act_led_trigger=none
dtparam=act_led_activelow=off
# Disable ethernet port LEDs
dtparam=eth_led0=4
dtparam=eth_led1=4

First steps with android

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For now I used no arduino stuff for projects, there was no need or it. I’m prefering simple solutions like AVR in C. 🙂

That’s my first try for a little project, the plan is to use a little display for showing some useful stuff like weather or temperatures. And to switch some stuff like the heating. I’m loving MQTT and openhab. 🙂

ECU reader finished (rly?)

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Now I finished my „ECU reader“. The values are read from my old octavia 1U (Golf 4 based) with KW1281 and 9600Baud, that’s very slow. But, for something like temperatures it’s okay.

I think this thing isn’t ready, the screen is a touch screen… 🙂

Software AGC with gnuradio and UHD device

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Not sure if this really works, just a try. In newer version from gnuradio there’s the option for the built in agc in the UHD devices. For me, that doesn’t work. I played with this thing a while. Behind the 1. filter is a probe, that’s the value for the signal level (10.0*math.log(rf_pwr_lvl+1.0e-11)/math.log(10)). The variable „agc“ has the magic formula for the gain. I use with (10.0*math.log(rf_pwr_lvl+1.0e-11)/math.log(10))*-1)*0.5.

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