On the workbench

FieldMesh

1. FieldNode — Sync and Power-Off Fixes

   • Readings now sit on a fixed UTC clock grid, so nodes no longer drift into the sync window together
   • An alarm that comes due during a wake is now handled, not wiped
   • A node never powers off over a pending RTC alarm
   • A node that loses its clock listens for the hub in short bursts and recovers by itself

2. FieldHub V2 — Sync Sweep Results

   • Two nodes against Hub V2, with a hub boot delay injected from 0 to 85 s
   • Original timing: both nodes joined up to a 30 s delay, neither from 35 s
   • Hub woken 45 s before the slot: the edge moved to 70 s, as the timing model predicts
   • A missed window costs time, not data: queued readings upload at the next one

3. FieldHub V2 — Sensor Bring-Up

   • Four I²C sensor ports verified with an SHT40, including at 400 kHz
   • ADS1015 inputs within about 1% of a reference meter, no crosstalk
   • Reed input works, but its GPIO moves in the next revision
   • Still to test: ESP-NOW, RTC backup retention, longer wake cycles
   

4. FieldHub V2 — Scaling the Network

   • First test: controlled hub boot delays, two nodes against Hub V2
   • Goal: measured node capacity instead of theoretical estimates

5. FieldNode V4 — PCB Layout Complete

   • Layout complete and prototype manufacturing package prepared
   • Final review fixes: SDI-12 resistor value, reverse-battery protection

6. FieldMesh — Updating the Public Project

   • New FieldHub V2 renders on the FieldMesh pages
   • Case study checked against the repositories: built, tested, planned

7. 18 Oct

   FieldMesh Node V4

   The Node V4 schematic has completed a major review cycle and is moving toward PCB layout.

8. 16 Oct

   FieldHub V2

   FieldHub V2 has moved through final prototype-production checks.

9. 15 Oct

   FieldMesh Platform

   FieldMesh completed a substantial backend and firmware hardening pass.

Auris

1. Auris — Choosing Parts for the Audio Front End

   • Every fitted part in the audio front end has an exact LCSC part number, test pads aside
   • Signal-path capacitors are C0G, and bias and DC-blocking capacitors are tantalum
   • One ceramic that didn't belong on a bias node was caught and replaced
   • Next: the same check for the power and LTE sections

2. Auris — From Concept to Hardware

   • Audio front end, solar power and LTE sections defined
   • Next: MCU and processing architecture

Sketch Surf

1. 16 Oct

   Sketch Surf

   Sketch Surf reached version 1.4.0 this week.

Auris

1. Concept development

   Auris

   Auris is an early-stage concept for a compact autonomous acoustic recorder focused on low-power field deployment.