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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@indianajones
@Robin, really interesting information, and again I greatly appreciate the time everyone has been taking to help me. I saw a demo of two Arduinos chatting on I2C, and it looks similar to what you described. But even better, I found this chip, a Cypress I2C Dual Slave Bridge: https://www.cypress.com/documentation/datasheets/cy7c65221-dual-i2c-slave-bridge
This chip appears to solve the exact problem I have, and even more, appears to allow me to chain as many as I want, which is really important to my project. I now have a lot of work to do before I move forward with this dual-slave chip, but hey, I have a solution!