Fig. 13From: Positioning and guiding educational robots by using fingerprints of WiFi and RFID arrayRSS energy-enhanced depth-first algorithm development (a, b, c). The algorithms of Fig. 12 are illustrated separately from left, bottom and right respectively. a Erob from left enters routing decision (left). b Erob from bottom enters routing decision (middle). c Erob from right enters routing decision (right)Back to article page