Source code of the IoTLogBlock Achitecture (to be published) in 44th IEEE - LCN 2019 conference.
Chistos Profentzas, Olaf Landsiedel, and Magnus Almgren. 2019. In Proceedings of the International Conference on Local Computer Networks (LCN). paper, talk.
For any distributed system, and especially for the Internet of Things, recording interactions between devices is essential. At first glance, blockchain seems to be suitable for storing these interactions, as they allow multiple parties to share a ledger. However, at a closer look, blockchain requires heavy computations, large memory, and always-on communication; these are three properties that are challenging for IoT devices. In this paper, we present IoTLogBlock to address these challenges, which connects IoT devices to the blockchain, and it consists of three building blocks: a contract signing protocol, a blockchain network, and a smart contract. We evaluate our design on low-power devices and quantify the performance in terms of memory, computation, and energy consumption. Our results show that a constrained device can create a transaction within 3 s on average. Finally, we expose the devices to scenarios with edge connections ranging from 10 s to over 2 h.
We implement the contract signing protocol, in C for the Contiki-NG OS.
We implement the smart contract in GO for Hyperledger-Fabric.
We implement the API to interact with the smart contract in Node.JS.
We support Texas Instruments CC2538 SoC.
Under ContikiNG/IoTLogBlock.
The Originator of the protocol logic: ContikiNG/IoTLogBlock/chain-originator.c.
The Responder of the protocol logic: ContikiNG/IoTLogBlock/chain-responder.c.
For Sending transaction to the Hyperledger Network:
To compile, you need to install the GCC compiler toolchain and tell the Makefile where to find it.
For the compiler, we use gcc-arm-none-eabi-7-2017-q4-major. Download the binaries of this version of the compiler suitable to your system, then extract the archive on your system. Consult GNU MCU Eclipse page for help.
You need to modify the following variable in the Makefile in accordance to your installation:
GCC_INSTALL_ROOT := ~/opt/gnu-mcu-eclipse/arm-none-eabi-gcc/7.2.1-1.1-20180401-0515
GCC_VERSION := 7.2.1
GCC_PREFIX := arm-none-eabi
We have the following configuration parameters to specify in compile time, with the make command:
TARGET=openmote-cc2538 # Default supported platform
MAKE_NET = MAKE_NET_IPV6 # Default uIP low-power IPv6 stack, with 6LoWPAN and RPL.
Compile command example:
make clean && make
To program the connected mote:
make TARGET=openmote-cc2538 PORT=/dev/tty.usbserial-[DEVICE PORT] chain-originator.upload
make TARGET=openmote-cc2538 PORT=/dev/tty.usbserial-[DEVICE PORT] chain-responder.upload