MarmoFACT HR

Heart rate from the pulse board, in the browser

Not connected

Heart rate

--bpm

board: --

HRV (RMSSD)

Coverage

Placement--

PPG, band-passed

Dots: beats found here, in the browser. Orange ticks: beats the board marked.

Accelerometer (g): x red, y blue, z grey

Board status

Species

Detect automatically

Detected--

Sets the board's detector and this page's: marmoset 150-480 bpm on the green channel, human 30-220 bpm on IR. Automatic detection reads the pulse rate: under 150 bpm is a human, over 220 a marmoset, and it switches after a few seconds of agreement. In between (a running human, a very calm marmoset) it leaves the choice alone.

LEDs

Set LED currents on connect

IR Red Green

Codes 0-255, 0.2 mA each. The board boots at 50 (10 mA). On the tail the pulse was at the noise floor at 10 mA; 150,60,150 is the PC default to try. Keep IRDC under about 400,000 and OPT=ok.

Session

Pre-roll before START (s) Trace window (s)

The pre-roll is the status-only pause hostlib/receiver.py also makes: the board sends its constant fields (BOARD, IMU, CHARGE) only while idle.

About

Talks to HealthMonitor1 (CH591D firmware v6/v7) over Web Bluetooth, with the same protocol and detector as hostlib/ and the iPhone app. Works in Chrome or Edge on a Mac, Windows, Linux or Android. Safari and Firefox have no Web Bluetooth. Keep this tab in front while recording: a hidden or sleeping tab stops receiving.

Recordings from this visit