Definetely the receiving node should be set in API mode. This does not mean that the receiving node is also the coordinator.

The others with the sensors should have the IR set accordingly. Also if you have analog sensors, then the input that it is connected should be ADC enabled.

Remember that the analog inputs are 0-Vdd Volts. Not 5 volts inputs.

Also each node should have a unique address.

Ioannis