Raspberry Pi Expert Needed: Build Custom Node-RED Flow for 6-Zone Heat Treatment Controller (PWHT)

Hi, I'm looking for an experienced Raspberry Pi and Node-RED developer to create a complete, professional Node-RED flow for a custom 6-zone post-weld heat treatment (PWHT) controller. Project Overview We have a Raspberry Pi 5 setup with: - 6 x MAX31855 thermocouple boards (SPI, multiple CS pins) - 8-channel relay board (for zone control via dry contacts) - Optional touchscreen for local use The goal is a robust, industrial-grade controller with: - Full ramp/soak profile control (ramp up rate °C/h, soak temperature, soak time, ramp down rate) - Product/Job ID field (text input that appears on chart title, logs, and filename) - Real-time dashboard with: - 6 individual temperature gauges - Live multi-line chart (all TCs + setpoint) - Start/Stop/Hold buttons - Status display - Automatic CSV logging (timestamp, Product ID, all temps, setpoint, stage) - Master PID control (using TC1 as process value, PWM output on GPIO 18 for energy control) - Mobile/remote access ready (dashboard works on iPhone/PC) Deliverables - Full importable Node-RED JSON flow (tested on fresh install) - Clear documentation/comments in the flow - Instructions for any custom nodes or setup - Optional: Basic branding (dark theme, semi-transparent logo background if provided) Requirements - Proven experience with Node-RED (especially contrib-max31855, contrib-pid, dashboard) - Raspberry Pi hardware knowledge (SPI, GPIO, relay control) - Understanding of PID temperature control and ramp/soak profiles - Ability to deliver clean, reliable code Please reply with: - Examples of similar Node-RED/Raspberry Pi projects (especially temperature control or industrial dashboards) - Estimated time to complete - Any questions Looking forward to working with a pro who can make this look and perform like a commercial unit! Thanks!