DIGWDF ESP/XBee Snap-In 사용자 설명서 - 페이지 9

{카테고리_이름} DIGWDF ESP/XBee Snap-In에 대한 사용자 설명서을 온라인으로 검색하거나 PDF를 다운로드하세요. DIGWDF ESP/XBee Snap-In 9 페이지. Wireless adapter board

pins 1 and 2 should be 3.3vdc or close to it. If the L78L33 regulator is used, the

voltage between pins 1 and 2 should be 2.9-3.3vdc.

o The L78L33 regulator is inadequate for powering the ESP8266 module or if using

the XBee Snap-In as a transmitter. It should be fine for an XBee radio in receive only

mode.

o If using the XBee radio, the voltage between pins 1 and 10 of the XBee radio should

be 2.9 – 3.3vdc.

o If using the ESP module, the voltage between pins 2 and either 3-5-7 should be

3.3vdc or close to it.



If it's not working:

o Check soldering and voltages to make sure you don't have an accidental short.

o If using an ESP module, ensure that the proper pair of circuit pads are soldered

together.

o The most common problem is that the radio is not configured properly, either at the

transmitter or at the receiver or both. Remember, XBee radios need IDENTICAL

settings while ESP modules need to work with your Wi-Fi router/access point.

o The second most common problem is that the PIC is not programmed properly. The

PIC and the radio of choice must be using the same baud rate.

o When using the ESP module, if you use start address firmware in the PIC and a also

in the ESP module's setting, you could easily create an unworkable combination. We

suggest using the start address in one or the other, but not both – it's too hard to

figure out what channels the controller is actually using if you use both.

o Be sure that the snap-in's ground is connected to the controller's ground.

o The plug-in option using the stackable headers that poke out the bottom of the PCB

applies ONLY to the SS8, SS16 and SS24 controller that uses either the ST485BN or

compatible chip in the U5 position. When plugging the snap-in into the U5 socket, be

sure that all 8 legs of the headers are plugged in – it's easy to miss one or two and

possibly create a problem.

o Because the snap-in pirates electrical power from the controller board, it's entirely

possible that the controller's power supply doesn't have enough extra current

available to power the snap-in. Remember, the LEAST amount of current necessary

is 50ma (XBee radio in receive mode) and the ESP module needs 230-250ma all the

time. If the controller is underpowered, the snap-in's current requirements may

push it over the edge and make the controller behave erratically. If this is the case,

consider power the snap-in with an external wall wart, making sure to connect the

snap-in's ground to the controller's ground.

o Remember that XBees are limited to 57,600 baud communication speed.

DIGWDF XBee/ESP Snap-In Assembly & User Guide – v 20170308 -Page 9