I'm trying to communicate CC430 microcontroller based board with ESP8266(NodeMCU). I can communicate in one-direction e.g. NodeMCU to CC430. However I can't send any character CC430 to NodeMCU board. What could be the problem? Connections are done properly e.g. Vcc--> Vcc , GND --> GND , SDA --> SDA , SCL --> SCL . There are also pull - up resistors. I tried the Arduino to NodeMCU communication , there is no problem with that. However neither Arduino nor NodeMCU can't get any character from CC430 side.
Code is given with link : https://dev.ti.com/tirex/explore/node?node=ALKC78J64Cwe6EXqBJh1DQ__IOGqZri__LATEST