ComboTool

Made by AppCombo, this tool brings two practical functions into one place: a USB to UART console for serial TX/RX tasks and an EEPROM “Burn” mode for 24xx/25xx chips. It suits DIY debugging and small chip jobs without extra desktop software. Users planning to download ComboTool should note it targets CH341 modules and requires a matching hardware mode. Below are the key features users will find.

Two selectable modes: USB to UART console and EEPROM Burn for 24xx/25xx. INT# rising-edge pulse counter for simple event or signal measurement. Works with CH341 adapters; compatibility may vary by vendor or module design. Clear main screen to choose Console or Burn before connecting hardware. Small footprint, practical for bench testing and quick DIY troubleshooting.

USB to UART console for serial TX/RX

The console mode turns your phone into a USB to UART bridge for CH341-based adapters. It is useful when monitoring microcontroller logs, sending quick commands, or checking sensor outputs through a serial line. Instead of opening a laptop, you can plug in an adapter and watch TX/RX activity on the go, which helps during field tests or when space is limited on a workbench. The ComboTool app keeps this flow straightforward by providing a direct console view once the correct hardware mode is set on the adapter.

Real-world use depends on the wiring provided by your CH341 module vendor. Some boards expose dedicated pins or sockets, while others need jumper wires to reach TX/RX and ground. Compatibility can vary, and unstable behavior may appear on certain modules. If you encounter intermittent connections, try a shorter USB cable or a different CH341 adapter. The developer notes support is possible but not guaranteed, so it pays to test your exact hardware combination before relying on it in a project.

INT# pulse counting for quick measurements

In console mode, the adapter’s INT# pin can be used as a rising-edge pulse counter. This helps with simple event counting, such as tallying button presses, relay on/off cycles, or encoder pulses when you just need a rough total. It’s a handy feature for quick diagnostics without setting up more complex measurement tools. The ComboTool app provides a way to watch the count while you trigger the signal, giving immediate feedback during bench checks.

Because the counter reads rising edges, it is best used for clear, debounced signals. If your source is noisy, a simple hardware filter or a cleaner test signal can improve results. It is not a precision timing instrument, so for detailed frequency or jitter analysis, dedicated equipment is more appropriate. For light-duty pulse counting and fast verification, it fills the gap well.

EEPROM Burn mode: read, write, erase for 24xx/25xx

Burn mode supports basic read, write, and erase operations on common 24xx (I2C) and 25xx (SPI) EEPROM families. This covers many small memory chips used in consumer electronics for configuration or firmware fragments. Typical scenarios include backing up a chip’s contents before repairs, restoring settings, or cloning data between identical devices. The ComboTool app lets you select the chip family and run the operation from a simple set of controls.

Correct wiring is essential. Some CH341 boards ship with sockets or breakout pins suited to specific IC packages; others need careful pin mapping. Always follow your module vendor’s diagram to avoid damaging the chip. Not every EEPROM variant will behave the same, and operation speed depends on the chip and adapter. If an action fails, recheck the wiring, ensure the mode switch is set to Burn, and try a stable power source. The developer does not guarantee full compatibility across all CH341 hardware, so testing with your exact setup is advisable.

Hardware mode switching and safety notes

The adapter selects between Console and Burn using a physical jumper or switch on the CH341 module. Mode changes happen in hardware, not in software, and should be made with care. To avoid damage, the developer advises disconnecting your phone before switching modes. This habit protects both the adapter and the device from unexpected signals during transition. The ComboTool app then reflects the chosen mode when you open its main screen and pick Console or Burn.

Module designs differ. Jumperless boards may offer simpler switching, while others rely on movable jumpers. If a particular module proves unstable, trying a different vendor or a higher-quality USB cable can help. Because compatibility is not guaranteed, users working on critical tasks should verify behavior with test chips or sample data first. Once stable, the workflow becomes predictable and suitable for routine bench work.

Download ComboTool on APKPure

You can download the latest ComboTool APK from APKPure and install it like any standard Android app. The download time depends on your connection, and the size may vary by version, so ensure sufficient storage before starting. During installation, your device may request permission prompts. When you first connect a CH341 adapter, Android may also ask for USB access approval.

After installation, open the app and choose Console or Burn on the main screen. Set the adapter’s hardware jumper or switch to match your choice, and always disconnect the phone before changing modes. If you plan to work with 24xx/25xx chips, gather the correct wiring diagram in advance. With the setup ready, you can begin testing serial lines, counting pulses, or backing up small EEPROMs confidently.