void parseULP() File file = SD.open("ULP.txt"); while(file.available()) String line = file.readStringUntil('\n'); if(line.startsWith("#")) continue; int sep = line.indexOf('='); if(sep > 0) String key = line.substring(0, sep); String val = line.substring(sep+1); key.trim(); val.trim(); if(key == "target_temp_c") targetTemp = val.toFloat(); // ... other assignments
import json config = {} with open("ULP.txt") as f: for line in f: line = line.split("#")[0].strip() if "=" in line: k, v = line.split("=", 1) config[k.strip()] = v.strip() with open("config.json", "w") as out: json.dump(config, out, indent=2) ULP.txt is far more than an arbitrary filename—it represents a design philosophy of simplicity, accessibility, and interoperability. Whether you are tuning a sensor network, configuring a RADIUS server, or simulating a warehouse, mastering the use of this humble text file can drastically reduce development time and empower end-users to customize behavior without touching source code. ULP.txt
# Comment line parameter_name = value Or for CSV-style: void parseULP() File file = SD
# ULP.txt for motor controller v2.1 unit_load_max = 85 temp_threshold_celsius = 70 p_gain = 1.45 i_gain = 0.22 d_gain = 0.07 The firmware reads this file at startup, allowing non-programmers to adjust behavior by simply editing a text file on a removable drive. In RADIUS authentication servers, ULP.txt can be referenced as a custom policy file where administrators define rules per user or group. For instance, a Wi-Fi captive portal might read ULP.txt to apply bandwidth limits or time-of-day restrictions. # Comment line parameter_name = value Or for
# Greenhouse controller settings target_temp_c = 22.5 hysteresis_c = 1.0 sample_interval_sec = 30 mqtt_broker = 192.168.1.100 mqtt_port = 1883 The Arduino sketch reads this file using a simple parseULP() function: