🕹️ Practice arcade
Extra games, not extra homework — timed sprints, survival runs that end when your lives run out, and mastery drills built from the same skills Connected Devices and the Internet of Things teaches.
⚡ Sprints
Beat the clock.
🔢 Bytes and Addresses Sprint
UTF-8 and JSON byte counts, then subnets: the missing byte, the host count, the prefix that fits. Two minutes.
🔁 Reconnect Sprint
Backoff attempt times with a cap, attempts during an outage, and the offline queue that rides it out. Two minutes.
💸 Fleet Cost Sprint
Monthly message cost, stored gigabytes, and what a token bucket lets through. Two minutes.
💀 Survival
Each miss costs a life — lose them all and the run ends.
🚦 Transport and Status Survival
TCP or UDP for each message, and what each HTTP status code tells a device to do next. Three misses and you're out.
🧭 Topic Filter Survival
Which topics a filter receives, and which filter asks for exactly what you need. Three misses and you're out.
🛡️ Threats and Releases Survival
STRIDE per element, what boots after a failed update, and the right semantic version. Three misses and you're out.
🎯 Mastery
No clock — just get N in a row.
📶 Link Budget Mastery
Transmission delay, the tries a lossy link costs, and a reconnecting Wi-Fi node's battery life. Five in a row.
📡 LoRa Airtime Mastery
Semtech's time-on-air formula by hand, then the uplinks a duty-cycle limit allows. Four in a row.
📬 MQTT Delivery Mastery
Packets per hop after the QoS downgrade, keepalive deadlines and ping counts. Five in a row.
📦 Payload and Shadow Mastery
Count a message's CBOR bytes, and compute a shadow's delta from desired and reported. Five in a row.
🧠 TinyML Budget Mastery
Quantize and dequantize int8 values with a scale and zero point, and budget a model against the app slot. Five in a row.