This article describes how BANDAI used AWS IoT to manage millions of connected Tamagotchi Uni devices worldwide, enabling secure connectivity and efficient firmware distribution.

• Tamagotchi Uni are wi-fi-enabled virtual pets allowing global user interaction and content downloads
• AWS IoT Core provides secure authentication, connection, and messaging for all devices
• AWS IoT Device Management enables fleet indexing and dynamic device grouping for OTA updates
• Serverless architecture uses Lambda, DynamoDB, S3, and Timestream for scalability and cost optimization
• AWS IoT Jobs initially limited to 1,000 executions per minute, causing update delays
• Solution: continuous jobs targeting dynamic thing groups based on customer update requests
• Dynamic groups use fleet indexing with four query conditions including connection timestamp
• Device Shadow manages firmware versions and update flags efficiently
• Parallel shadow updates via SQS and Lambda significantly reduced distribution time
• Load testing verified stable performance under large-scale access

AWS IoT enables BANDAI to securely connect and manage millions of Tamagotchi devices globally while delivering timely firmware updates based on customer demand.