Hi,
I attempted many times to install InfluxDB in my raspberry Pi 4B (64 bit) and here is the result:
pi@raspberrypi:~ $ wget -q https://repos.influxdata.com/influxdb.key

pi@raspberrypi:~ $ echo ’23a1c8836f0afc5ed24e0486339d7cc8f6790b83886c4c96995b88a061c5bb5d influxdb.key’ | sha256sum -c && cat influxdb.key | gpg –dearmor | sudo tee /etc/apt/trusted.gpg.d/influxdb.gpg > /dev/null
influxdb.key: OK

pi@raspberrypi:~ $ echo ‘deb [signed-by=/etc/apt/trusted.gpg.d/influxdb.gpg] https://repos.influxdata.com/debian stable main’ | sudo tee /etc/apt/sources.list.d/influxdata.listdeb [signed-by=/etc/apt/trusted.gpg.d/influxdb.gpg] https://repos.influxdata.com/debian stable main

pi@raspberrypi:~ $ sudo apt-get update && sudo apt-get install influxdb2
Hit:1 http://deb.debian.org/debian bullseye InRelease
Hit:2 http://deb.debian.org/debian bullseye-updates InRelease
Hit:3 http://security.debian.org/debian-security bullseye-security InRelease
Get:4 https://repos.influxdata.com/debian stable InRelease [6,874 B]
Hit:5 https://deb.nodesource.com/node_16.x bullseye InRelease
Hit:6 http://archive.raspberrypi.org/debian bullseye InRelease
Err:4 https://repos.influxdata.com/debian stable InRelease
The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY D8FF8E1F7DF8B07E
Reading package lists… Done
W: GPG error: https://repos.influxdata.com/debian stable InRelease: The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY D8FF8E1F7DF8B07E
E: The repository ‘https://repos.influxdata.com/debian stable InRelease’ is not signed.
N: Updating from such a repository can’t be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
 
Can you help me on that?
Thanks