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UbuntuでESP32を使う際のVCPセットアップメモ

Posted at

下記リンクからwgetなどを用いてソースをダウンロードの後、展開すれば良い。
https://www.silabs.com/documents/login/software/Linux_3.x.x_4.x.x_VCP_Driver_Source.zip

以下を実行する。

sh
wget https://www.silabs.com/documents/login/software/Linux_3.x.x_4.x.x_VCP_Driver_Source.zip

unzip Linux_3.x.x_4.x.x_VCP_Driver_Source.zip

cd Linux_3.x.x_4.x.x_VCP_Driver_Source

make

sudo cp cp210x.ko /lib/modules/4.9.140-tegra/kernel/drivers/usb/serial/

sudo insmod /lib/modules/4.9.140-tegra/kernel/drivers/usb/serial/usb_wwan.ko

sudo insmod cp210x.ko

また、起動時に以下のステップが必要である。
/dev/ttyUSB*は各自環境によって違う。

terminal
$ sudo chmod 666 /dev/ttyUSB0

自動化するためにexpectなどを用いてやると良い。
ただしパスワードを直接ファイルに書き込むのは危険なので工夫すること。

sh
#!/bin/sh

PW=$(openssl rsautl -decrypt -inkey ~/.ssh/id_rsa -in ~/.ssh/password.rsa)
expect -c "
set timeout 5
spawn env LANG=C sudo chmod 666 /dev/ttyUSB0
expect \"password:\"
send \"${PW}\n\"
expect \"$\"
exit 0
"
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