# 2026-04-20 — Session Notes## Model Mess (resolved)- Removed minimax-m2.7 fallback from crash-bot — now primary, empty fallbacks- GLM times out in Discord DM context (speed vs Thinking's async Telegram)- Crash-bot on minimax-m2.7 primary, you control what happens next- Config rule: always backup before editing openclaw.json## ZFS Drive Prep- Created projects/zfs-drive-prep.md as tracking file- Confirmed 6×4TB + 3×3TB cold drives need testing (11 total listed, 2 skip CasaOS)- Pool plan: 5×4TB raidz2 + 1 hot spare + 3×3TB raidz1- sdb, sde tested (0 errors)- sdc, sdd: CasaOS data drives — skip testing- 8 cold drives need model/serial inventory- Hot swap: not reliable on this desktop board — manual power cycle for cold drive testing## Projects- Whisper on Dell: containerize approach, safe path decided- ComBadge: hardware not ordered## 2026-04-20 01:46 UTC- ZFS drive prep: 3 cold 4TB drives loaded (sdb, sde, sdf)- SMART tests running in parallel (sdb long ~8.5hrs, sde short ✅, sdf long ~10.6hrs)- badblocks -nvs running on sde (0 errors so far, ~16+ hrs to completion)- sde SMART attrs clean: 0 reallocated, 0 pending, 0 uncorrectable, 8,943 power-on hours, 35°C- sdf (ST4000VN008 IronWolf) SMART short also passed- Power adapter issue resolved — all 3 drives now detected- sde model limited: doesn't support long SMART test, ran short instead- sdb has 89k power-on hours — needs close monitoring (old WD Red)## Brewery PID Project — Major Session (2026-04-20 17:00-13:27 UTC)### Architecture Decision (major shift from earlier)- **ESPHome** preferred by Topher for easy HA integration (not Arduino custom firmware)- **Per-PID architecture** (not central) — hot-swappable, no single point of failure, like-for-like replacement of original PIDs- All 8 units identical hardware — hot/cold mode is software switch in ESPHome YAML- Display: Surenoo NX4880E043 Nextion Edge (4.3" 480×800, ~$35-40)- Controller: ESP32-S3-based (AITRIP Supermini, XIAO C3/S3, or WROOM-1U with U.FL)- Both hot and cold sides use G3MB-202P SSR (120V AC coil switching)### Key Hardware Decisions- **Display:** Surenoo NX4880E043 Nextion Edge — 4.3" 480×800, 128MB flash, CTP, slim bezel, ~$35-40- **Output driver:** G3MB-202P DIP-4 SSR (2A, 120-380V AC, ~$1.50) — both hot and cold sides- **Steel box RF issue:** Use ESP32 with U.FL/IPEX connector + external antenna mounted outside enclosure- **MAX31865:** Amazon B0GSYV2SM8 5-pack modules (~$19) — use module with headers, not bare IC- **Controller options evaluated:** - AITRIP ESP32-S3 Supermini (5-pack ~$13, no antenna) - Seeed XIAO ESP32-C3 ($5.80/unit with external antenna, 8MB flash) - Seeed XIAO ESP32-S3 (3-pack ~$22-30, 8MB PSRAM + 8MB flash) - ESP32-S3-WROOM-1U-N8 from LCSC (~$5.50, U.FL built-in, for custom PCB)### Per-Unit BOM (~$48-49)- ESP32-S3 module: ~$5-6- MAX31865 module: ~$3.80- G3MB-202P: ~$1.50- MOV (250V): ~$0.20- Terminals, passives: ~$1.50- Custom PCB: ~$2-3- **PCB subtotal: ~$14-15**- **+ NX4880E043 display: ~$37**- **Per unit total: ~$51-52**### 8-Unit System Total: ~$410-415### Project Files Updated- `projects/brewery-pid-replacement.md` — fully revised with new decisions- `projects/brewery-pid-bom.md` — new file, per-unit PCB BOM checklist### ESP32 RF/Steel Box Issue- Topher raised valid concern: steel enclosure attenuates WiFi signal- Solution: ESP32 with U.FL connector + external antenna outside the box- XIAO C3 with patch antenna (~$5.80) is clean option for this- XIAO S3 3-pack also option if already owned### Still Open- Nextion display still not found in Topher's lab — or order NX4880E043- XIAO C3 vs S3 decision pending (C3 fine for ESPHome YAML work)- Custom PCB design not started yet (EasyEDA)### Related Context- Brewing systems: PSB (off limits), so kept separate- Topher teaches electronics, has EasyEDA PCB skills- Surenoo JC4827W543 also still on table as alternative display## 2026-04-20 20:42 UTC — End of Day Status### ZFS Drive Prep — Current State- sdb, sde, sdf in Dell Aurora-R3 for testing- SMART: all 3 drives passed (sdb long ✅, sde short ✅, sdf extended ✅)- badblocks -nvs in progress: sde running (~64%, 17+ hrs elapsed, zero errors)- sde estimated completion: ~9-10 more hours (early 2026-04-21 UTC)- After sde: sdb badblocks, then sdf badblocks- All cold drives still need testing: 8 remaining (models/serials TBD)### GPU Context (from memory)- Topher found Quadro K600 (GK107 Kepler, 1GB DDR3) in Dell Aurora-R3- K600 working with nvidia-driver-470 (570 doesn't support Kepler)- K600 too weak for LLM inference — noted GTX 1070/RTX 3060 as better local AI GPU options- Matt mentioned GTX 680MX (MacBook Pro) and GP102/Titan X as potential upgrades- Topher found RTX 5070 12GB for $100 used — asked about it in crash-bot-public### Drive SMART Notes- sdb: 89k+ power-on hours — oldest drive, needs close monitoring even though SMART passed- sde: MD4000GSA6472E, 8,943 hours — healthy, clean attrs- sdf: ST4000VN008 IronWolf, 16,180 hours — healthy