Assume we have a
micro-controller and it collects a meta-data (ex. a payload as a string). How this
micro-controller can interact "directly" with smart contract to write this data to the blockchain?
Must we use something like Oraclize? Since a smart contract cannot interact directly with an external source.
And also, do we need to install, "necessarily", a Geth or Parity client on this
Is there a practical / existing example for such a scenario?
From my point of view, this
micro-controller can collect data and then by calling a function in smart contract (ex.
writePayload()) writes data in the blockchain "without" using an oracle such as Oraclize.
Note: According to the comments on this question: Is it possible to call a function of smart contract "without" installing "Geth" or "Parity"? , isn't it easier to use
infura as an existing node, instead of installing