Configurable NTP server (support local/LAN time source)

[noizecrypto]

The idea

Let users set the NTP/SNTP server AxeOS uses (Settings UI + API/NVS),
instead of a hardcoded/default public server.

Why

• Self-hosters with a local GPS-disciplined Stratum-1 NTP server on their LAN
  want the miner to sync from it.
• Air-gapped / isolated networks (solo setups running bitcoind + pool + miners
  with no internet route to public NTP) — today the miner clock never sets.
• Privacy: avoid the miner reaching out to an external NTP provider.
• Accurate on-device timestamps for logs/uptime.

Current behavior

No NTP option in the dashboard; AxeOS uses a fixed/default server, and DHCP Option 42
doesn't appear to be honored.

Prior art

The NMAxe fork (NMminer1024/ESP-Miner-NMAxe) already added a configurable NTP server

• timezone on this codebase — so it's proven feasible and could likely be ported.

Proposed

• "NTP Server" field in Settings, persisted in NVS, exposed via PATCH /api/system.
• Optionally honor DHCP Option 42 when no manual value is set.

Would the maintainers be open to this? Happy to help/test on my hardware.

[0xf0xx0]

esp-miner doesnt use (s)ntp at the moment, were you misled by a llm?

[noizecrypto]

Withdrawing this — you're right, ESP-Miner doesn't currently use (S)NTP, so the request was based on a wrong assumption on my end. Apologies for the noise. Closing.