[murre87]

Summary

deye-svk.lua computes the energy headroom from bat_soc whenever battery_capacity_wh > 0. When the SoC read fails in a poll, bat_soc is nil and math.floor(bat_soc * 100 + 0.5) raises a Lua error, so the whole poll fails. This adds the same guard the 50-125k-svk drivers already use (and bat_soc), so the headroom stays 0 for that poll. Version 0.2.2 -> 0.2.3 in the driver and manifest, CHANGELOG entry under Unreleased.

Seen in the field in EnergyWizard (driver from commit e07d27038e83): automatic error report ftw_deye-svk.poll: LuaError, murre87/energywizard#215. Fixed there by lazgeo (Co-authored-by in the commit). Context: murre87/energywizard#231.

Driver evidence

• Driver id: deye-svk
• Device make/model: Deye SUN hybrid (lean SvK fast-poll variant)
• Firmware tested: none
• Protocol/register source: unchanged, no register changes
• Hardware test performed: no, not tested on Deye hardware (draft until it is)
• Known limits: only guards the nil case; behaviour with a valid SoC is unchanged

Safety

• The driver starts read-only, or this is a separately reviewed control change. (No control change.)
• Vendor signs are converted at the driver boundary. (Unchanged.)
• Cached telemetry becomes stale instead of being re-emitted as fresh. (Unchanged.)
• No credentials, serial numbers, private addresses or site data are included.

Control evidence

not applicable (no control path changes)

Checks

• Commits include Signed-off-by.
• make test-driver ID=deye-svk (not run locally)
• make check (not run locally; the Lua compiles with Lua 5.4)