Andrei Pozolotin Andrei-Pozolotin

Here is a working experimental implementation. Basic approach is:

use piecewise interpolation for stepper motor pulse profile
persist interpolation segments once, inside esp32.RMT.items store
start sending pulses from items store with rmt.h | rmt_set_clk_div() and rmt.h | rmt_write_items()
continue sending by switching between pulse patterns with rmt.h | rmt_register_tx_end_callback() system ISR

	//
	// https://github.com/bogde/HX711
	//
	// sensor setup:
	// * 5V supply (from nano)
	// * 128 gain (library config)
	// * +-20 mV input range (derived from gain)
	// * int32_t output range (library convention)
	// * 80 Hz (12.5 ms) sample rate (jumper on board)
	//

	"""
	"""

	import tester
	import logging

	from logging.config import fileConfig

	from sqlalchemy import pool
	from sqlalchemy import engine_from_config

	"""
	robust cluster connection pool
	"""

	import asyncio
	import logging
	from contextvars import ContextVar
	from typing import Awaitable
	from typing import List
	from typing import Mapping

	--- session=0 ---
	count=100000 time_diff=0.179 time_unit=1 micro
	--- session=1 ---
	count=100000 time_diff=0.168 time_unit=1 micro
	--- session=2 ---
	count=100000 time_diff=0.168 time_unit=1 micro

	--- session=0 ---
	count=100000 time_diff=2.300 time_unit=23 micro
	--- session=1 ---
	count=100000 time_diff=2.262 time_unit=22 micro
	--- session=2 ---
	count=100000 time_diff=2.145 time_unit=21 micro