Topic

ntp

A collection of 50 issues

Embedded NTP client/NTP interleaved mode, part 3

Previous posts: part 1 [https://blog.dan.drown.org/archmax-ntp-client/], part 2 [https://blog.dan.drown.org/embedded-ntp-client-ntp-interleaved-mode-part-2/] In this post, I wrap up my embedded NTP client and use it to measure the difference between my other two NTP servers with hardware timestamps. Goal 1: synchronize the local clock

STM32MP1 NTP server, part 2

Previous post: https://blog.dan.drown.org/stm32mp1-ntp-server/ [https://blog.dan.drown.org/stm32mp1-ntp-server/] I figured out my offset problem, which was not a PLL problem like I thought. Connman has a NTP client enabled by default :(The distro I'm using uses connman by default to manage the

STM32MP1 NTP server

Previous post: Debian for STM32MP1 [https://blog.dan.drown.org/debian-for-stm32mp1/] NIC Hardware Timestamps First step: enable hardware timestamps in chrony.conf: chrony configuration for hardware timestampsNext, enable chrony's measurements log, and verify it's using hardware timestamps (H) not kernel timestamps (K): it's using

Wifi NTP server

I saw a thread about someone who wanted a low power NTP stratum 1 server that could run off of batteries and could be put somewhere without an internet connection. That had me wondering how an esp8266 would do in that situation. The hardware I put together was an esp8266

NTS part 2

Part 1: Packet format of Network Time Security [https://blog.dan.drown.org/ntp-security/] I wanted to measure the overhead that NTS adds to NTP. To give a rough estimate, I modified the benchmark program included in libaes_siv [https://github.com/dfoxfranke/libaes_siv] to use similar parameters as

NTP security (NTS)

I've been hearing about Network Time Security (NTS) being in development for awhile now. With Cloudflare's release of a public NTS [https://blog.cloudflare.com/secure-time/] service, I wanted to take a closer look at the protocol and test it out. The current NTS draft [https:

Embedded NTP client/NTP interleaved mode, part 2

Hardware transmit timestamps added to NTP client.

Embedded NTP client/NTP interleaved mode

NTP client with hardware timestamps

APU2 NTP server

I bought an apu2c0. I believe it will make a better NTP server than my other NTP servers.

RK3328 based NTP server

I got a ROC-RK3328-CC [https://libre.computer/products/boards/roc-rk3328-cc/] SBC because it has true gigabit ethernet, emmc, and USB3. These are all better I/O options than the latest Raspberry Pi 3 B+. I put a SATA hard drive in a USB3 adapter and connected it. The SBC froze