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1.BN-357： GPS+GLONASS双模定位，内置FLASH，5V供电，TTL电平输出，9600，1HZ输出，NMEA-0183协议输出。
2.BN-357B： GPS+GLONASS双模，内置FLASH，5V供电，232电平输出，9600，1HZ输出，NMEA-0183协议输出。
3.BN-357C: GPS+GLONASS双模，内置FLASH，5V供电，USB电平输出，9600，1HZ输出，NMEA-0183协议输出。
4.BN-357G: GPS+GLONASS双模定位，5V供电，内置FLASH，TTL电平输出，9600，1HZ输出，NMEA-0183协议输出。外置天线
5.BN-357H: GPS+GLONASS双模，5V供电，内置FLASH，RS-232电平输出，9600，1HZ输出，NMEA-0183协议输出。外置天线
说明：该模块可以设置成GPS+GLONASS双模，也可以设置成GPS+北斗双模。一般国外用GPS+GLONASS双模，国内用GPS+北斗双模。出货前提前说明，没有说明则按照默认GPS+GLONASS双模出货。
GPS+GLONASS双模模式数据输出：
$GNRMC,013300.00,A,2240.84105,N,11402.70763,E,0.007,,220319,,,D*69
$GNVTG,,T,,M,0.007,N,0.014,K,D*3A
$GNGGA,013300.00,2240.84105,N,11402.70763,E,2,12,0.59,70.5,M,-2.5,M,,0000*68
$GNGSA,A,3,10,12,14,20,25,31,32,26,29,40,41,22,1.09,0.59,0.91*1F
$GNGSA,A,3,74,70,73,80,69,,,,,,,,1.09,0.59,0.91*17
$GPGSV,4,1,16,01,00,300,,10,56,178,51,12,12,038,38,14,47,345,48*79
$GPGSV,4,2,16,16,00,207,,18,06,275,30,20,28,165,43,22,10,319,43*76
$GPGSV,4,3,16,25,46,050,47,26,29,205,44,29,13,108,45,31,50,296,52*7E
$GPGSV,4,4,16,32,56,010,52,40,20,257,40,41,46,237,48,42,46,123,42*77
$GLGSV,2,1,06,69,27,136,49,70,76,057,50,71,34,338,50,73,64,276,55*6B
$GLGSV,2,2,06,74,24,231,46,80,35,019,46*60
$GNGLL,2240.84105,N,11402.70763,E,013300.00,A,D*7C
GPS+GLONASS双模模式数据输出和信号测试：
GPS+北斗双模模式数据输出：
$GNRMC,013854.00,A,2240.84063,N,11402.70748,E,0.004,,220319,,,A,V*17
$GNVTG,,T,,M,0.004,N,0.008,K,A*31
$GNGGA,013854.00,2240.84063,N,11402.70748,E,1,10,0.91,72.6,M,-2.5,M,,*6E
$GNGSA,A,3,10,14,12,25,29,31,32,20,26,,,,1.72,0.91,1.46,1*00
$GNGSA,A,3,24,,,,,,,,,,,,1.72,0.91,1.46,4*0D
$GPGSV,3,1,11,10,53,178,43,12,10,037,37,14,49,348,40,20,26,165,36,0*69
$GPGSV,3,2,11,25,43,047,39,26,32,205,37,29,14,105,37,31,51,301,43,0*66
$GPGSV,3,3,11,32,58,015,43,41,46,237,41,42,51,128,34,0*50
$GBGSV,1,1,01,24,56,275,40,0*47
$GNGLL,2240.84063,N,11402.70748,E,013854.00,A,A*7B
GPS+北斗双模模式数据输出和信号测试：
需要将GPS连接到电脑的客户，可以买一根USB调试转换线：https://detail.1688.com/offer/616705086790.html?spm=a26286.8251493.description.2.UjtizO
购买模块，免费配送一根6pin，1.25间距，单头，15cm的线，如图：
