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The two nodes, 'A' and 'B' are placed within radio range of one another are powered up with the MODE pin held high. The LEARN pin on one device - say 'B' is briefly taken low, placing the node into learn mode. The LEARN/ERASE status LED on 'B' comes on and remains on for 20 seconds. If within this period, no 'learn' data packet is received (see below) then the LED will be extinguished and the device will operate normally. At node 'A', the LEARN pin is briefly taken low. The LEARN/ERASE status LED will then come on and node 'A' will transmit its address. Node 'B' will receive and store the address of 'A'. Node 'B' sends back to node 'A' both its address and that of node 'A'. Node 'A' receives and stores the address of 'B' and confirms to 'B' that it has received the information. Both node 'A' and 'B' LED's flash their status LED's rapidly for 3 seconds to show that they have learned each others addresses. Note: Other nodes which may be active will ignore this transfer since they have not been placed into learn mode. If notification of correct reception (or otherwise) of data packets is required but it is not possible or desirable to carry out the learn process then a modified addressed mode of operation may be implemented. In this mode, both nodes have their eeprom memory erased using the erase process, thus placing null serial numbers ($000000) for the 'other' node into both device eeproms. If the devices are now employed in addressed mode (power up with MODE pin high) they will operate as if they had learned one another's identity using the normal learn process. Note that in this mode, only two device may be employed within range of one another since data transfer is effectively carried out as a broadcast to all nodes with a null address.
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