Please I need help on how to successfully implement mobile nodes in Contiki-OS 2.7 using Cooja Simulator. I chose Contiki 2.7 over Contiki-NG since the former has well documented tutorials at: https://anrg.usc.edu/contiki/index.php/Contiki_tutorials, but follwing its tutorial on mobility at:https://anrg.usc.edu/contiki/index.php/Mobility_of_Nodes_in_Cooja, has not worked for me. It yields me a lot of errors. I have gone through all the suggestions I saw on blogs but to no avail. Please help me if you have successfully implemented it.