RTDB

RTDB is a small, lightweight library that provides a minimal in-memory real-time database and a set of signal types used to store timestamped values.

Installation

---

Clone the repository. The package is small and is intended to be used by importing modules directly from the repository root:

git clone https://github.com/mrGSOF/RTDB
cd RTDB

Quick usage

---

The RTDB object holds named signal instances. Signals are appended with values; each append records a timestamp provided by RTDB's time source. Example:

import time
from rtdb import RTDB
from signals import signalContinuous, signalDiscrete, signalMessage

rtdb = RTDB(time.time)
rtdb.addSignal("alt_m",       signalContinuous(maxHistorySize=48))
rtdb.addSignal("state_enum",  signalDiscrete(maxHistorySize=48))
rtdb.addSignal("message_str", signalMessage(maxHistorySize=48))

rtdb.resume()
rtdb["alt_m"].append(1000.0)
rtdb["state_enum"].append(1)
rtdb["message_str"].append("start")

print(rtdb.getJson())

Primary types / API summary

---

RTDB

• RTDB(getTime=None) — constructor, pass a time source function (e.g., time.time).
• addSignal(name, signal) — attach a signal instance under name.
• getJson() / saveJson(filename) — export structure (signal names, types, sizes) to JSON.
• loadJson(filename) — create signals from a saved JSON structure.

Signals (common API)

• All signals expose append(value) to add a value at current time, getAt(time_or_offset) to query by absolute/relative time, getJson() for serialization helpers and print() for diagnostics.
• signalContinuous — adds linear interpolation between samples when querying at intermediate times.

License

---

This project is released under MIT license in the LICENSE file.