dr, Can send you data sheet on module. Email hello@helium.co - Not sure on 1v8 - SPI / UART - All module and bridge programming happens OTA - We have ardui

dr, Can send you data sheet on module. Email hello@helium.co - Not sure on 1v8 - SPI / UART - All module and bridge programming happens OTA - We have arduinos for making pocs, the module is currently 19x12mm I believe. - Our next module will have u.fl. (in the works now) - Network goes in both directions. Access from the internet via ipv6. drFritz.xx.helium.io. -You can also communicate to other devices. The other device can be anywhere as long as it's on the helium network and you are allowed to speak to it. shoot us an email, would love to speak more!