From 6c3b161702771e0a8bbe5345ade198e397ac1601 Mon Sep 17 00:00:00 2001 From: Mihai Tudor Panu Date: Tue, 9 May 2017 12:44:48 -0700 Subject: [PATCH] knownlimitations.md: describe solution for I2C capacitance issue on Edison Signed-off-by: Mihai Tudor Panu --- docs/knownlimitations.md | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/docs/knownlimitations.md b/docs/knownlimitations.md index 7cc62fb5..982745d5 100644 --- a/docs/knownlimitations.md +++ b/docs/knownlimitations.md @@ -94,10 +94,9 @@ This affects the **DS18B20**, **DS2413** and **DFREC** drivers. Some *I2C* sensors add too much capacitance to the SDA line of the Intel Edison Arduino breakout board, thus the signal sticks to a logic 1. When this happens, -other sensors connected to the I2C bus are unusable. While there is no generic -solution for this limitation, in most cases the sensor works on the Intel -Edison Mini-breakout. When this board is not an option, the sensor can be -sometimes replaced with the same model from a different vendor. +other sensors connected to the I2C bus also become unusable. In order to solve +this problem, an I2C repeater that isolates the capacitance on the bus, such as +the PCA9517 can be used. The Intel Edison *SPI* bus can corrupt data being sent across when certain sensors are connected to it, if using an old image. This has been resolved with