A flexible tracking device for monitoring a cable is configured to be secured to the cable by bending around the cable at a bending region of the flexible tracking device. The flexible tracking device includes a flexible substrate, a battery, a device layer, a flexible circuit connecting components of the device layer and the battery, and a flexible cover layer on the substrate covering the flexible substrate, the battery, the device layer, and the flexible circuit. The device layer includes a processor, a memory coupled to the processor, and a first wireless communication antenna connected to a first wireless communication interface. The flexible tracking device is configured to undergo a bend in the bending region, wherein the bending region does not overlap with components of the device layer that cannot tolerate bending.