The world of IoT devices grows day by day. The interaction of IoT devices increases day by day. Interactions of IoT devices become valuable for many applications. Each special and spatial interaction of IoT devices is a meeting for them. An IoT meeting requires that they should see each other directly via a short-distance communication channel. In this work, meetings of IoT devices are kept and exchanged with others. IoT meeting transactions should be reliable. For this purpose, a special blockchain is proposed, and formation mechanism of IoT meetings is designed accordingly. The proposed blockchain uses Proof-of-Work consensus mechanism to mine meeting transactions. Transactions are signed by IoT devices against data tampering. In the blockchain, 5 types of actors are formed according to their own resources. These are meeting declarer, meeting confirmer, data requester, data provider, and miner. The blockchain transactions are designed to protect privacy and rights of the actors. Moreover, the blockchain has its own cryptocurrency. Actors other than data requester are rewarded with cryptocurrency to increase the willingness of data sharing and to increase participation in forming meeting transactions.