Question 1

How to compile usqlite for ESP32?

Accepted Answer

Follow the ESP32 wiki guide: clone the usqlite repository, add it to your MicroPython build with CMake, and compile using the standard MicroPython toolchain. The README provides specific steps, but it assumes familiarity with embedded development environments.

Question 2

usqlite vs using a simple file for data storage in MicroPython?

Accepted Answer

usqlite offers SQL querying, transactions, and data integrity, making it better for complex queries and structured data. For simple key-value storage, a text file is lighter but lacks ACID properties and query flexibility.

Question 3

Can usqlite handle multiple connections or concurrent access?

Accepted Answer

SQLite, and by extension usqlite, supports limited concurrency; simultaneous writes may cause locks or errors. It's best suited for single-threaded or carefully managed access in embedded applications.

Question 4

How do I monitor memory usage with usqlite on a Raspberry Pi Pico?

Accepted Answer

Enable monitoring with mem_status(True) before executing SQL, then use mem_current() and mem_peak() to track usage. Adjust configurations in usqlite_config.h, such as switching to static memory allocation, to reduce heap pressure.

Question 5

Is usqlite compatible with all SQLite desktop tools?

Accepted Answer

Yes, database files created by usqlite are standard SQLite 3.x files, so they can be opened and edited with tools like DB Browser for SQLite, assuming the SQLite version is compatible (usqlite uses version 3.47.0 by default).

Question 6

What SQLite features are missing in usqlite compared to the standard library?

Accepted Answer

usqlite implements a subset of DB-API 2.0, so some advanced features like custom aggregates or extensive error handling might be limited. The README notes compatibility differences, and users should test specific APIs.

uSQLite

What is uSQLite?

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