A standout feature of the firmware (airOS LTU) is its support for independent frequency configuration on TX and RX chains , commonly referred to as Split Frequency . This allows the Access Point (AP) to use different frequencies for uploading and downloading, which is a massive advantage in high-noise environments where specific parts of the spectrum may be too congested for two-way communication. Key Firmware Capabilities
// Deployment altitudes (meters above launch pad) #define APOGEE_DELAY 1 // seconds after apogee detection #define MAIN_ALTITUDE 300 // deploy main at 300m AGL ltu-rocket firmware
Another critical aspect of the LTU-Rocket firmware is its state machine architecture. A rocket’s life cycle is linear but complex, moving through distinct phases: idle, armed, powered ascent, coast, apogee detection, and descent. The firmware manages these transitions with absolute authority. For instance, the detection of apogee—the point of maximum altitude—is a non-reversible event that triggers the deployment of recovery systems. The software logic must be unambiguous, utilizing multiple criteria (such as accelerometer zero-crossing and barometric pressure thresholds) to confirm this event. By strictly defining these states, the firmware prevents premature deployment during the high-dynamic-pressure phase of ascent or late deployment, which could result in ground impact damage. A standout feature of the firmware (airOS LTU)
You can load this into or Excel to compare real vs. simulated flight. A typical plot will show: A rocket’s life cycle is linear but complex,
Standard Wi-Fi firmware is often limited by its "listen-before-talk" nature, which struggles in high-density or noisy environments. The LTU firmware overcomes this by utilizing a custom ASIC and proprietary protocols. Key architectural advantages include: